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Men struggle to identify some colors -

Yes, men and women do see colors differently, with males particularly struggling to identify certain shades of colors such as yellow or green. "Across most of the visible spectrum males require a slightly longer wavelength than do females in order to experience the same hue," explains psychology professor Israel Abramov.

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Men fart a lot -

Men beat the ladies when it comes to flatulence. Probably not something males are too proud of, but indeed they are a lot gassier. The reason, though, remains a mystery. “It could be diet, bigger GI tracts, and/or swallowing more air," says gastroenterologist Marc Taormina.

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Erections don't necessarily mean arousal -

Men get erections when they are aroused, but they also do so in other circumstances. Just sitting at a desk or riding on a bus can trigger this physical response in men.

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Men can get breasts -

Men can develop a condition known as gynecomastia, where breast tissue actually grows. This can be due to hormonal issues (namely the testosterone-estrogen ratio). The condition can actually be painful, causing swollen and/or tender breasts, with or without nipple discharge.

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Men can get breasts -

Men can suffer from it at any age, but as they grow older and their testosterone levels drop, they become more susceptible to it. Men can also suffer from pseudo-gynecomastia, which is an accumulation of fat in the area.

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Men also get breast cancer -

While breast cancer is far more likely to affect women, a small percentage of men also suffer from it. They also have a worse survival rate, which may be linked to the fact that many of the cases are diagnosed at later stages.

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Fetal penile erections -

Yes, male fetuses can have erections in the womb. These in-utero erections are apparently a way to keep the tissues oxygenated. "The phenomenon of fetal erection has been recognized for some two decades. Advanced technology has made it possible to demonstrate its occurrence even before the 16th week of gestation," says A.A. Jakobovits, from the department of obstetrics and gynecology at Toldy Ference Hospital in Hungary.

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Dads can also suffer from postpartum depression -

Paternal postpartum depression has similar symptoms to maternal postpartum depression. This is more common in men who are struggling financially or with their relationship, or have a history of depression.

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Men gain weight after marriage -

This might have something to do with increased sedentarism, changes in diet, getting older, and hormonal changes. Still, this seems to indeed be the case among married men when compared to single and divorced counterparts.

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Men are more likely to go to the hospital for UTIs -

Women are more likely to contract urinary tract infections (UTIs), but men are actually more likely to be hospitalized because of them.

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Men are more likely to go to the hospital for UTIs -

This is especially true for older men. A study that analyzed ER records of over 10 million patients confirmed this to be the case.

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Men’s arms are really good for punching -

Similar to other species, male bodies evolved to be efficient in battle (mostly among those of the same species).

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Success raises a man's testosterone level -

Yes, success actually raises testosterone in men. Winning really matters, biologically speaking, for men.

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Failure lowers a man's testosterone level -

If success raises testosterone in men, failure has the exact opposite effect.

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Underwear may have an impact on male fertility -

Optimal sperm production requires the testicles to be at a certain temperature. Men wearing tight underwear will press their crown jewels against their body, which is usually warmer. This can affect sperm quality.

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Men go through andropause -

Men have their own version of menopause. The common adverse effects they experience (fatigue, weight gain, loss of muscle mass, impotence, and even depression) are largely due to a drop in the level of just one hormone: testosterone.

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Men can get yeast infections -

Men are not as prone to yeast infections, but they can get one through intimate contact with someone with an active infection or due to poor hygiene.

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The "semen-displacement hypothesis" -

This is an hypothesis, and not yet a scientifically-proven theory, but psychologist and assistant professor of human development at Oswego State University Gordon Gallup Jr. believes that the male reproductive organ is as competitive as some men are.

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The "semen-displacement hypothesis" -

Gordon Gallup Jr. says that “the morphology of the human p e n i s may act to plunge another male's ejaculate from the reproductive tract of his partner." Wowser!

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Men have a peculiar odor -

Men secrete a pheromone called androstenone through both urine and sweat. This pheromone, which is secreted thanks to testosterone, smells differently to different people.

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Deodorant can actually make a man more attractive -

It turns out an artificial fragrance can make a man more attractive. A study looked at how women rated men on body odor and through their photos. Those who scored lower in attractiveness in physical features but wore a fragrance scored higher in terms of BO. Thus compensating for the lack of physical attractiveness.

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Men sweat a lot -

In general, men sweat more than women. This means that men's sweat glands release more sweat than women's at a given temperature. This is mostly due to differences in body size and hormones.

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Parkinson's disease is more common in men -

Men are more than twice as likely to develop this neurodegenerative disorder when compared to women. The mortality rate, however, is higher among women.

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Parkinson's disease is more common in men -

The reason why men are more susceptible to developing Parkinson's disease is not entirely understood. One hypothesis points to the fact that estrogen offers some level of protection to women, at least until they reach menopause.

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Men have thick skin and less cellulite -

Men’s skin is about 25% thicker than women’s skin, which gives them an advantage when it comes to aging. They’re also less likely to have cellulite, but some men actually do.

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Men develop bigger noses than women -

Males develop bigger noses and nasal cavities than females. This is in mostly in proportion to the size of their faces.

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Nocturnal penile tumescence -

Nocturnal penile tumescence (NPT), aka morning glory, is mostly caused by hormone fluctuations, but it has been suggested that the bladder pressing against the sacral nerve may also play a role in stimulating it, causing an erection.

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Men can lactate -

This is indeed very rare, but can happen. For this to take place, a spike in the production of the hormone prolactin (responsible for enabling milk production) must occur. This can happen as a medication side effect or due to a pituitary tumor.

Sources: (Health Digest) (BBC) (Los Angeles Times)

See more: The most common causes of impotence in men

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