I've yet to take T, and still unsure whether or not I want to... BUT, the dysphoria can be very bad. Sometimes I would start to have sex with my girlfriend and my mind would start racing. If she touched my nether regions I would totally zone out and be done. Speaking about it was difficult because I didn't know the reason it was happening...
But, I know that when she has sex with me, if she makes it feel like she's giving me a bl*wjob like a male would receive, it feels a lot better and I don't freeze up. But unfortunately for her she can't get me off with her hands because... It just doesn't feel good.
Try different things though. Try having sex with a strap on, and as you get more into the moment, take it off and have your man mouth you as though you have a dick. You can also try getting a pump which will thicken up and elongate your angry lil inch, and you can give yourself an h-j... and most importantly, don't focus on what you have or don't have... rather, try to focus on how it feels. good luck.