If you'd rather have a guy cum on you than in you (and then subsequently flop down on top of you after climax), you say "make me a quesadilla". Can be used in conjunction with I'd rather get mexican.
For men, it's something you say to your ugly wife when she offers to give you yet another sub-standard blowjob, because a good quesadilla is always better than your 1000th lackluster BJ. Can be used in conjunction with I'd rather get mexican.
Dude: I'm gonna cum!
You: Make me a quesadilla! I'd rather get mexican!
Wife: Baby, you want me to suck your cock?
You: Oh, just make me a quesadilla. I'd rather get mexican.