Do you have to give someone a wedding gift if they never gave you a wedding gift?

If you attend the wedding or the reception you should give a gift. It's not required and you don't have to give anything if you don't want to. ---- In polite society, gifts are NOT to be expected. Giving a gift is optional whether you received a gift from them or not, whether you go to the reception or not. The invitation is to join them in celebrating the event.