Did sangwoo throw up because....?

or because he is conflicted because he equals sex with bum with fucking his mom, which explains why he prefers to take him from behind

This is actually a good point

Maybe he just drank too much

LOL I was wreaking my brain over this and you made me forget it altogether

our boys need years of therapy :B

Does he really like to fuck his mom though? I mean that is worse than incest... incest I can deal with but parent x child ummmmm no.....

err a parent and child intercourse IS incest, incest does not involve siblings exclusively, here is what the dictionary says:

inceste , nom masculin

Sens 1
Inceste désigne une union charnelle, sexuelle illicite entre parents à un degré pour lequel le mariage est interdit. Par exemple, la relation sexuelle entre un parent et son enfant est un inceste, ainsi qu'entre un frère et une soeur.

Also, when i mean he wanted to fuck her does not need to be in the most literal even thought he is so deeply disturbed that it might be so, what i am referring to is to the depth and gravity of his unresolved Oedipus complex which is a widely known construct in psychoanalysis, but hey, psychoanalysis it's very well known in France with Françoise Dolto and Jacques Lacan being such important figures ^^