The earth has been depopulated! The only humans left are just you....and Dick Cheney (or Rosie O'Donnel, if you're a guy). You have the option of repopulating the human race by rigorous copulation, or letting our species perish. Rosie's surprisingly open to hetero nookie in this scenario. What do you do?
Buck up and start procreating as much as my loins can bear
I'll make one or two kids. Whatever happens after that, I've done my part for the preservation of the species
Human race goes bye-bye. No one's getting pregnant if I have anything to say about it
Not only do I not procreate with the other person, I beat them within an inch of their life and leave them for dead