Yes. There are plenty of ways to get him to try it. Cum in your mouth and make out. Have him cum in you and have him go down on you or sit on his face while he goes down on you afterward. Our favorite way for him to taste himself is to have him cum in my pussy, go down on me until I cum and then we’ll make out for a while afterwards with his cum in our mouths.
No. I don't think people should have to do stuff when it comes to sex, especially when it's against their will. I don't see a similarity at all between us going down on guys and tasting and swallowing their cum, and a guy trying out his taste.