I take it you don't realise how the surgery is done. The head of my old penis is moved and repositioned to form the clitoris. I have been lucky that the sensation in the penis head has not died, therefore i get just as much sensation as you do when somebody licks the head of your penis. It is quite simple really, no bullshit here, just pure pleasure. I hope i have just educated you.
Do not know exactly how having your cavity licked gets you off as your penis used to be there. A bit of Harry and Meaghan bullshit going on here. Really bad acting actually in the Harry and Dud bitch class.