In my fantasy world I'm in phase with the OP. Of course, those fantasy spankings were self administered, naked, with my own bare hand across the crack of both buttocks. Each slap forcing my penis into the lap of the pretend authority figure, & providing fairly significant sphincter stimulation.
Then through FerLife I found a very honorable, straight, elderly play doctor, who caters to women, but sometimes also to male "littles" & "middles" like me. From him I got some real naked spankings. Problem is that he didn't believe in going across both sides of the buttocks. It was one alternate side at a time. Rather than providing the warm, stinging sphincter stimulation, the pain was very localized and stung, even when it was bare handed. It wasn't erotic The play doc wanted to experiment with various spanking implements, including ping pong handled, & none of them as warm & intimate as a bare hand.
Truth is the localized stinging pain wasn't my cup of tea. The nice play doc told me other clients enjoyed getting the shit spanked out of their bottoms. Not me. We had 5 sessions I was living a dream, but & the whole experience wasn't quite like fantasy. I never even got an erection las I do in my fantasies. However, I did enjoy the attention
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It was my only live CMNM or CFMM meetup in years of posting on the web.. Others fell through because of health problems & hidden agendas. (Well there was also the Asian massage therapist that I paid for & who was so damn nice. )