A guy doesn't have to get an abortion if he doesn't want one, but it would be ridiculous to allow him to take control over the woman's body and force her to undergo a pregnancy if she does not want to. A man who finds himself in this situation got into it by operation of his own stupidity. Men don't usually get forced at gunpoint to have sex. At least, only have sex with people that you know well and trust. Or, maybe, just abide by that good, old-fashioned "morality" that we hear so much about and don't have sex with anyone you're not married to. "No" is an easy word to say.