Should a man be obligated to pay child support if he doesn't want the child?

This isn’t a simple yes or no, but in general when a man and a woman have sex, there is always a chance of pregnancy. If you choose to have sex with someone, then you must accept that a pregnancy may occur and you have to take responsibility for that action. Since, as a man, it’s not his body going through the changes it’s up to the woman to decide to keep the baby or not. Now if a man was raped, (it has happened) should he be responsible? Then what if the man wants the baby and the woman doesn’t should she be forced to continue the pregnancy? You see it not that easy.