Do a lot of men lie about their sexual history?

Sadly, it is very common for teenagers and many young men to lie about their sexual history. Why do we do this? It really comes down to social pressure and competition. There is mistaken idea in our society that guys have to "prove their manhood" by messing around with girls. Thus, when one member of their group becomes sexually active (or claims to be), the other guys feel the need to share a similar experience so as not to be left out. Some will be able to successfully date and may well have a legitimate sexual encounter... some will date but not get physical... and some will not date at all. Because of their need to feel accepted by the rest of their friends, guys who fall in the last two categories will frequently lie. I regret to say that I did this occasionally in high school, but I came clean when I found out that the rest of my friends were lying too. Honestly, when high school guys talk about their sex lives, there's a 90% that they're not telling the truth. That number goes down as people get older, but not as much as it should.