The only guy who rides with me regularly is my son. He's 13 now and started on the tank of my Sporty at 2. He can drive the thing from the back he's that good. I sometimes have to look back to make sure he didn't fall off since I can never even feel him. With him on we do drill team style turns in parking lots and scrape the floorboards on a regular basis on the roads too.
My wife, who usually rides her own, is also a great BSR. I can tell she's behind me for two reasons... The left reason and the right reason. In my back. I married her for a reason.

Any other girl gets on the back of my bike and I tell them the hands go on my belt loops at my sides. The boobs go in my back and they stay there. They either get offended and are fuming and forget to worry about my riding or they get a kick out of my tacky behavior and forget about my riding. Either way we're thru a few turns and then they relax and aren't usually a problem.
Of course I never notice what's pressed in my back.... Honest. I swear. Really. And the new gasket's will fix all your leaks.
Ride Safe,
J-Carr