With his luck, Doof would constantly be called upon to fulfill the sexual fantasies of Vanessa or Roger.
…or both of them together!
And he'd be so sick of Candace and Suzy fighting over who gets Jeremy. On the bright side, I think Linda still has a thing for him, plus he's probably Phineas' real father. I mean, look at the hair! (Probably some mix-up at a masquerade party led to all sorts of Danville kids being related.)
Happy dreams.