I used to work in a skate shop and we sold Mr Zogs sex wax (surfboard product) air fresheners and we would always get the funniest responses to that. "The fuck I wanna smell like sex for?"
I'm not gonna lie, it's not entirely easy. I'm 6'1" and the wife is 5'3" so I concur with you here. Basically she will either bend all the way over and point her backside upwards to where I can just bend my knees a bit and put it in or just bends over normally and I just kinda have to bend my knees and ankles to make it work. That way typically can't last too long though cuz my ankles start to hurt pretty bad but I kinda just push through it because the sex feels better.
shower sex is alright like that if you're the one bent over getting a gallon of water in your mouth and dripping in to your face. but when you move the shower head outta the way and its not dripping on me, i feel like i'm freezing my ass off. good times.
I had shower sex with a guy once that was 6'5 (I'm 5'4) and he thrusted me onto my face a couple times because I was standing on tip toe so he didn't have to bend as much. Ended up with a black eye.