I'm 6' and was a collegiate swimmer. There was a female basketball player that was about 6'3 or 6'4 and VERY athletic who lived in the athletic dorm. She and I got friendly and ultimately ended up in the rack more than a few times. We tried a rear dog mount but she said it didn't stimulate her clit. We experimented and found that what worked best was for me to just lay on my back so she could straddle me. It was wonderful. I just laid there and got fucked while she knew exactly where to rub her hot spot. That was some great sex.