My roommate always does my dishes whenever he does his. I always do my dishes, every night (actual truth), so I don't assume it's out of passive aggression. He also rarely does his, maybe once a week. I do not wash his dishes when I wash mine, but he always washes mine when he does dishes. Am I the asshole for not washing his dishes every time I wash my dishes? I told him he doesn't need to do my dishes, but he told me he didn't care. Should I be washing his? He so rarely washes his dishes, I feel like I'd end up washing them every time because he never does his.

edit: I should also add his dishes are always massive as well, taking up the entire right side of the sink. Mine are usually just a few bowls, silverware, and whatever big dumb cup I used that day. I'm a fairly impatient person and I'm probably being dramatic to emphasize my point, but I like to do dishes correctly but also as quickly as I possibly can. Washing 3 large dishes caked in baked-on oven food triples the amount of time I wash dishes so I'd end up doing more of his dishes than mine.