Another thing is that most of these gay men are submissive types because of their age-they would like to be led into it than lead the whole gay sex. No one has touched them yet so their first time a much older man will have no comparison, in short, it will their basis or impression on gay sex. Moreover, this kind of gays are the ones that are still idealistic-most of them are still anal virgins and have yet to explore gay sex.
So they have very few ideas about how gay sex or gay relationships are like. Some of them may also have just come out of the closet. These are the times of young adults (18 to 25) than gay men like to go far because at this age they have probably just been discovering their sexualities-they have not yet experienced so much and have not yet done it with many other men.