I wish Lyra was little. Her body is about the size of a regular male's, but she's maintained her egg spot for the whole time we've had her (Since we started he sorority so at least a few months) despite her longer fins. Her ventrals are still female size though.
Ratchet likes the girls that are like half his size with feminine little fins. He's very specific with his tastes, too bad he'll never breed because of his tail biting and aggression. I don't want a hundred little mini-piranhas swimming around my tanks.