Men are put under serious pressure to act manly

 

am a man

Many of the mysterious behaviours men do have the goal of helping them feel more manly. Men are put under serious pressure to act manly as soon as they are born. Under that kind of pressure most men end up wanting to prove their manliness to the world.

Men who don't feel manly enough might develop some behaviours such as becoming sex addicts, spreading adult jokes or even beating women in order to prove that they are strong and manly. 

In other words many men put women down because they don't feel manly enough and the only way they found to feel better is making fun of women or putting them down