First/second generation Gaysians are often closeted due to tight knit (and often conservative) families.
Due to Asian males tending towards the non-hirsute and pretty, and their slighter (on average) physical stature it can also be difficult for such men to avoid being pigeon holed as twinks and/or bottoms. It can also be difficult for gay asian males to retain a sense of comfortable masculinity due to appearing more androgynous than other races as well as being gay.
Dean: The one with the long hair? Yeah, he's hot.
Jake: Poor guy, see all those fat old guys trying to dance with him?
Dean: Ugh, yeah, let's go save him.
2. Jake: I just got a new Dir En Grey CD!
Dean: Mmm, Shinya can be my pet gaysian any day!
Jake: Not if I get him first.