For me what I like about lolis isn't exclusive to them. I like petite women with small frames, they feel way more feminine than something like Khulan, for example.
But then again, Bo loves to do that thing with Ethan where, when he's fighting them, he's a lot smaller than all his female opponents. Maybe it's a result of his perception or done for a dramatic effect. Either way, I hate it, if he wants to make Ethan the size of a household pet might as well go all-out and introduce shrinking into the game.