Hmmmm how to wind down from big embarment? also why ask me of all ppl?

Well, the why question might be easier to answer. Your little brother probably looks up to you, and trusts you more than he does your guys' dad. Maybe he just feels closer to you, and less scared about asking you about what is happening to his body, and hoping that you will tell him the truth. I mean, if he had tried to ask your guys' father, your dad may not have wanted to talk about it, because it was too uncomfortable, or your brother could have been scared that he might possibly get hit for asking about something 'bad' like that, especially if your father has ever had a bad temper or something. I mean, it's only normal to want to talk to and learn stuff from someone you trust not to hurt you, and you brother probably trusts you so much that he knew you would never do anything to ever hurt him, even when he showed himself to you. As for how to wind down, I'm not sure there is any magic way that is going to make the embarment and tears go away, but I would suggest maybe playing a game, or listening to music, or finding something else to do to try and keep your mind busy so you are not "over-thinking" about it, which is probably making you so upset. I don't know if you have a good relationship with your dad or not, but if you do, maybe you could ask him if you could talk to him about what happened, or something. Anyway, I would try to not beat yourself too much over it, because it sounds like you weren't out to try and hurt your brother, or anything like that, so I am sure (or at least I hope so) that everything will be okay for you. Good luck!