i always am like, "Yeah, I'l warn you....don't worry."  except i don't...or i'll warn them right after I blow.  i hate it when girls act like it's fucking toxic poison.  i don't really give a fuck if you don't swallow it, but at least get the fucking job done and spit it out.
Tip for some of you younger dudes - eating lots of pineapple will make your jizz taste sweet.  avoid strong foods, i.e. garlic, onions, etc. as they make your jizz taste bad.