Silly questions

I’ve been on T for only a week, yet the little guy has managed to literally grow twice its size somehow! My questions mainly regard the sensitivity.

1. It randomly hurts, like a little needle is poking the poor guy. I’ve gotten tips from others saying that using lube alongside loose underwear helps. Which it does but is there anything else I can do?

2. Once the little guy is up, is there a trick to get him to go down ( that doesn’t involve hands, toys, etc ) ? Cause I go to college, it’s kinda hard to focus on class when the little guy decides he wants attention.

3. I don’t plan on being on T forever, I’m planning on taking it until I hit my goals and stopping. Since the effects I want are permanent. If I stopped taking T would it still be able to get hard?