So, what does estrogen do to the functioning of your hangdown? Can you still get bust fat nuts?
Not sure I could handle a woman who shoots bigger loads than me.
Proper hrt therapy and depending on the persons goals will result in lack of use (which will happen due to lower T). This gives way to atrophy in the old ding a ling. Lots of people shrink 2-3 inches. I don't want to peruse my numbers because that's without manners but it's a sizable decrease. Not only will decrease in size but will no longer function and you won't be able to get erections anymore. It's basically a useless tool. Hormone therapy also shrivels the testicles which results in no sperm allocation. Basically, you are damaging your testicles (

) to the point where you are infertile (which again, is why being trans is NOT a game of "Choose The Identity!" because you need to be fully prepared for all the risks).
This of course depends on whether or not they want to do all of this. Some want to stay fully functional, whether it's for better surgery results or because they like fucking people (only ever chicks really) with it. But those tends to be lesbo trans chicks. This also depends on the medicine. Spironolactone does all of the above including decreasing size, but bicalutamide doesn't cause atrophy of the dick but it does shrink the testicles so it results in a win-win. As an aside, I don't know too many straight trans women (as in, who like men exclusively) would be willing to have anything came out because that's disgusting. Ew.