I'm looking for 2 yaoi mangas. I think both series I'm looking for we're a collection of one shots.
One of them is about two friends, one of the friendwas somewhat coerced into a somewhat abusive relationship by his teacher but said teacher dumped him after he had gotten past the age he liked them and the kid had been borderline too old for the teacher to begin with. So because of the trauma of the relationship with the teacher, he only looks for guys who will treat him like crap and everytime he breaks up with with an abuser he call his friend. He makes his friend have rough sex with him, even though his friend secretly likes him and doesn't like the rough sex his friend asks him to do. Oh and I remember that in the end of the one shot, the friend kisses him and he's like "you really like kissing" and the friend thinks that it's not that. Oh and the masochist wears glasses.

The other story is about a guy who has to take care of he nephew who is I think in high school and likes to get around. Long story short he ends up in the infirmary because he had been holding back and the doctor tells him he just needs to masturbate and relief himself. He didn't want to do that because he felt dirty doing that thinking about his nephew so said nephew went into the room to help him "relief" himself.

Super Lovers http://www.mangaupdates.com/series.html?id=49207 has a similar scene to the one you've described (story 2). However, some facts are different.