It's OK, people these days don't know basic anatomy anymore, no one can tell if someone is a male or female. (Insert angry comments on how there's more genders than male or female blah blah I've heard the story a thousand times I don't care anymore, stay mad)
Chill they're not even human nor a real species... Who cares about their gender anyway. It's a pink being with boobs and a dick getting head from a Blue demon with boobs why are you overanalyzing this ?