Compatibility

This question was posed sometime ago by someone :

What would you do if you discover that your boyfriend is a boring lover, insisting on the missionary position only and won't consider going down on you?

What would you do if you girlfriend is frigid, treats your private part like an alien lifeform and with disdain, insisting on having sex only in the dark comfort of the bedroom?

What do you do when you find your partner sexually unadventurous? Or
sexually incompatible?

I say if you value the relationship go for couple therapy. Some say dump him/her. Is it that important? I think it works both ways, you have to be mutually responsible for it.