That 90's Show is pretty cringey and attempts to ret-con Marge and Homer's relationship as taking place during the 90's. It also goes for the usual lazy jokes you'd expect like Boy Bands, Grunge Rock, early internet, etc.
This is the problem with having a show that's on for years with characters that never age. The writers eventually forget what kind of generation the older characters are supposed to represent and so their backstories get fucked up.