Men think they're invincible, notwithstanding the mounting evidence that states otherwise.

Whether it's the inability to move the morning after playing basketball, losing a footrace to an 11-year-old or not quite being able to bounce back like you once could after a night on the town, the signs are there, just waiting to be acknowledged.

Men do get less foolish over time (not to be confused with getting wise). Things such as heart attacks, cancer and strokes teach many that their time on Earth is not infinite and that they, in fact, are not invincible.

That being said, they are still men, and men tend to ignore things that aren't right in front of them and don't involve loud explosions or nudity.

That's why men need to understand these five sleeper health risks before it's too late ...

Impotence

No. 5: Erectile dysfunction

Viagra, Cialis and numerous other drug companies spend millions of dollars advertising erectile dysfunction drugs, yet no man ever admits to having it. Not surprising, considering that most men equate their manhood with their bedroom performance.

When you were younger, the issue was likely the furthest thing from your mind. But as you get older you may find that things just don't quite work like they once did.

It didn't happen overnight. It's a gradual onset. Men don't understand gradual. Here are some things you need to understand about erectile dysfunction:

  • It's not life-threatening; it only seems that way.
  • Nearly 40 percent of men over age 40 suffer from erectile dysfunction, according to WebMD.
  • Men with erectile dysfunction report less enjoyment in life; you probably knew that already.
  • Drugs exist to help with, but not cure, erectile dysfunction.
  • Erectile dysfunction can signal more serious health risks, so don't be afraid to check with your doctor.

Erectile dysfunction could also cause the next sleeper health risk ...

Headache file

No. 4: Depression and suicide

Depression is believed to occur more in women than in men. Recent discoveries, however, indicate that men are nearly as susceptible to depression -- real depression, not "my favorite team lost an important playoff game and I'm really depressed" depression.

Men being men, they often suppress it.

Unlike women, who are often more likely to express sadness when they're depressed, men are more likely to become more aggressive and resort to drinking and other irrational behaviors. According to Men's Health, suicide is the eighth-leading cause of death among men, and although women are more likely to attempt it, men are more likely to succeed.

Men are less likely to see a doctor or reach out for help. This lack of reaching out has much more serious consequences than not asking for directions while on vacation. If you suspect depression, don't wait. Get help.

Depression is a lot easier to cure than the next sleeper health risk ...

ambulance at scene of car accident