My ex hit me rush with the "I might be pregnant" line... and I haven't fucked her since the beginning of November...
My reply "oh really? I think you're calling the wrong guy..first of all, I haven't seen you since November and the last time we had sex..I didn't nut because you got my at me for putting it in your ass?"
Her: "it's yours and I know it, you're the last guy"
Me: "right, good luck..you can keep it and I know it won't be my kid..call Maury for a paternity test and call up the potential fathers. We both know it's not me"
She went crazy over the phone and I hanged up..