You have to save the world-Ass or mouth?

Assume this poll is for straight males. An evil genius is set to destroy the world. The only way to stop him is to take a shot in either the ass or the mouth from him. You will not get any sort of disease. If you go with the BJ, you have to swallow. You get a reasonable amount of lube if you go with the ass, but its bareback. Think long and hard now. So which is it?