Totally situational, but premise can be used as c/f when you have a girl who talks openly about sexual matters.

My female friend who i am LJBF with (basically my smokin buddy, shes 24 im 20, no biggie for me, may be a biggie for her... for now) texts me this

"If theres more life in one drop of semen than in one drop of blood, why doesn't dracula suck dick? Happy Halloween!"

I get back at the gym and (19 minutes after it says she sent the text), see it, and respond with

"Aw blowjobs make me think of you too hun"

Its been an hour and no text back, ill let you know if anything materializes... but to quote Emmit Smith and Don't Be a Menace to South Central while Drinking your Juice in the Hood

DEBACLED! BLOWED UP! YOU JUST GOT KNOCKED THE F*K OUT B*TCH!

-Demarest

I don't know if that qualifies as C+F response, seeing as you basically told her you like her to suck your dick. I would have said cause "he'd have to the bite the dick first and then suck em; which is a turn off for most guys, but I don't know what freaky shit your into"

that was more along the lines of flirting rather than c + f, but the joke she opened u with was funny.