that's pretty much abstinence but i guess i'll explain
not wanting to fuck is fine, and not wanting to fuck for x period of time or whatever is fine. the reason i think abstinence is such an awful concept is that it is explicitly "I don't want to fuck at all until i enter into a probably extremely expensive legally binding contract". what if you do that and then realize that you really hate fucking the person you married? what if you generally like fucking, but just didn't get to do it for years? what if you get married then get divorced fairly quickly (fairly common? it's a bizarre concept that doesn't really make sense if you think about it. if both people are abstinent then they'll probably really suck at fucking when they get married, since sex is absolutely not something you save yourself for, it's something that you get better at with practice, so it's probably not even going to be good. abstinence is almost entirely a tool of social control, and while it sort of applies to men and women, it really is specifically targeted at women and historically hasn't really been strictly applied to men.
basically, if you want to fuck, then fuck, i don't see any reason why you would want to wait until one of the worst possible times to start. abstinence is deciding that you want to fuck one day, but only after you've decided to get rid of all your other options