To the best of my knowledge there isn't.
And I can't recall ever having read anything about players stats when they succeeded, so there's a hint to all players still struggling. You could start it, I'm sure it would be appreciated.
What you do is you work to increase dick size and do as many treatments you can afford at the Spa. Increasing your mojo might help , but training in the outhose is only for player vs player cockfights.