Not too long ago I was talking to a guy that did not know he was gay until he was 30 years old. So I asked him if in High School he did not jerk off thinking about guys, and he said no. While in the minority, I'm sure this does happen. Most of us know a friend or acquaintance's husband who seems to be on the down low. Then there are men who are straight and come of as less than masculine. I had never heard of this and thought that everyone's sexual preference was set by the age of 18. Who knew? flame away.