I feel ya on this. When doing it missionary my wife can easily clamp her kegal muscles to provide more friction. If she attempts it during doggie it just pops me out.My wife has asked me to answer . It’s difficult to get friction during intercourse. It’s more of a jab then a stroke ( that’s how she describes it) . Another issue is when it’s cold , it retracts where , it’s hard to hold to pee .