What Makes Men - Men

I've read a lot of articles recently about men and nudity.  Sure straight men don't normally engage in m4m4 sex, but most men check each other out when given a chance.  I did listen to an interview from a 20 year old who came out while in high school.  He reminded the listeners that if you are say a senior in high school being 18 years old and you find yourself having relations - even if it is just mutual touching - with say another senior who at the time is only 17 - if the 17 year old's parents finds out, it could make you, the 18 year old, in some trouble if the 17 year old's parents are not happy about it.  I know this is perhaps a bit far fetched, but in this day and age - you just never know. So I know it happens and I know it will continue to happen because it's what we do as men.  Below are some reasons why we might do what we do