Hearing "I'm tired" from a man is something I never understood.

For ages, men ensured their family's safety, obtained food by hunting, and were brave enough to lose their own lives for their families.
And when you hear, "I cannot get on my bike and go up this hill. My legs are tired"... how can you even say this?... a weak creature.
My definition of a man is someone who pushes his limits, is honest with himself, and knows what's right for him.