as girls know, having a little extra flesh in certain areas creates certain interesting gravity effects and sensation.
But you can't fuck with tits. You can fuck tits, but they sort of splooge out if you try to use them for anything other than smothering or nursing.
And just try doing anything masculine with a vagina LOL. "I'm going to fuck you deeply with my swollen engorged cli ohh oh ohohohoh ohhhh Im coming" etc etc
Having a penis however is like having an interesting live wire. Put your mouth on it, and watch what happens to the recipient. Impale yourself slowly on it while kissing said recipient and watch the expression on his face.
Like I said. Fun.