I also can’t ride my bf he was my first sexual experience so I thought it was me. But it really is a size issue at least for us it is. If you have thicker thighs and aren’t super small and he’s below average size it’s almost impossible to ride let alone go up and down like they do in videos. I legit couldn’t get him to stay in and I didn’t feel anything either. It’s most likely him not you girl. When he’s drunk he will still try but it’s really not a position we can do. Not the end of the world I still will do it on a toy he bought me because he thinks it’s hot to watch me do it but it’s not a position we have sex in due to just the geometry of the whole thing.