My psychology teacher explained that to us - Life begins at forty: She said men always say that, it's bcoz that's the time where they feel so insecure about themselves. It's like the menopausal stage on women. When they reached the age of forty, if they're married they try to be cool with women, try to have a relationship with women other than their wives so they could prove to themselves that they're still young...pardon to all the men with age 40 and above..i just shared what my teacher said...i don't know if this is really true..i hope not..