Yes, let's just get it out of the way

You pull back from Sam's hungry kiss. "Wait, Sam!" He pulls you back in and starts kissing your neck. At least that lets you speak, even if it is a bit distracting...

"I fucking wish it were different, but you can't fuck me tonight! Not my pussy, at least." "I've got condoms." You shove him back, harder this time, and he takes the hint and stands still. "Can't risk it. You heard what Mandy said: I'm absurdly fertile right now. One little tear, and my life would be over!"

Sam crosses his arms, getting visibly upset. "Oh, come on! What are the odds of that happening? Besides, I can still pull out, even with a condom on. That's double protection!" Ok, you need to smooth this over quickly. You need his help after all. You turn your back to him, bend over far enough to render your microskirt meaningless, and performatively fondle your ass. "Trust me, Sam. There is a tried and true method for this kind of thing." Just to make absolutely sure he gets the hint - he is a guy, after all - you trace a finger along the single string of fabric which makes up your panties and press it deep between your cheeks as you do so.

Sam walks up to you and replaces your hands with his own. "You're going to regret this, you know? Once I'm done with this little ass," he gives you a firm slap, "You won't be walking straight for days." Then he suddenly grabs you by one arm and flings you onto your roommate's bed. He is right behind you himself, and you begin making out in earnest. You're sure Diana won't mind the mix-up...