not a doctor, but my experience as a trans guy has led me to believe that getting off isn’t really a function of hormones so much as it is nerves. hormones help arrange some things (e.g. vaginal lubrication) that can make getting off easier / more enjoyable, but with enough patience, time, and comfort, you can more or less get off with the same intensity post-transition as one did pre-transition
although transmasc hrt does open up some new ways to get off that your kid will probably enjoy a lot lol
i can’t speak for all vulva’d people, but… i feel like that’s mostly a porn thing.
the amount of times i licked my hand before masturbating: once, to see if it was good. it wasn’t (and i find it kind of gross. no offense to ppl who are into it tho). and i masturbate a lot
pre-transition, getting it wet wasn’t even that hard. why would i use spit for that lmao. i mean some people might have that issue, right, but i’d still rather just use lube if that were the case
i think it’s just supposed to be hot for whatever reason