>>40478226 (OP)I had a trans GF for about a year, and here's how i was able to "shrink" her cock. like others have said, actually shrinking its size is not really possible, you will definitely be able to get results from HRT but it'll be negligible. the goal is to have you derive pleasure from other ways.
In the case of my ex, she loved cooming but i didnt want her to have a hard penis. even though it was smaller than mine, i like the idea of a limp, flaccid girly pp.
So i trained her to enjoy other kinds of stimulation; anal, psychological, nipples, etc.
Also the usage of flat chastity cages often. it also matters how you transition them. at first, she'd be allowed to masturbate when i fucked her or toyed with her body. but slowly it changed to only being allowed to use a vibrator, to using a vibrator only when caged, to not using a vibrator at all and only stimulating it by slapping her tiny balls, to not touching herself there at all.
it's a long process. but the result is a cute little girl with a limp, tiny pp that can only ooze precum and flop around pathetically. kinda wish i had a new gf to do that with, ngl...