I know I'm not the target demographic for this post, but I thought I'd throw my 2 cents in, hopefully without offending anyone. I'm a female, in every sense, but I perform as a drag king on a regular basis. I'm really very, very girly except when I'm performing. Early in my drag career, packing (I use socks), even when my costume wouldn't show it, became a VERY important part of my ritual to get into character. It changes my gate, posture, carriage, and mentally helps that male persona click into place. I know I'm ACTING instead of LIVING it, and that trans men aren't in drag, and I know there's a huge difference. Trust, I have a lot of respect for trans folks. But I figure if my "schlock" as most of us affectionately refer to our packing socks, can help femmy femmy me who has never wanted to have a real cock in any sense feel manly and help me find that gate and posture, surely someone who actually is MALE would find it to have an even greater impact. I find that if I go on stage without my package, I feel naked and awkward and, just, OFF, even if it's a costume where the packing won't show. I think I'd feel the same if any part of my character wasn't in place. I need to be fully bound and have my face shaded and facial hair on, my real hair slicked and tied back, boy clothes on, boy underwear on, packer in place. If any of those things is missing, I feel weird. Half-drag happens sometimes when travelling between a show and I NEVER feel as uncomfortable as when I've got my face shading on and I'm bound but don't have my boy clothes on, or have my face and clothes done but I'm not bound yet. So, anyway, based on my experience as a king, I can only assume that packing would just be another one of those pieces that would help a trans guy feel a little more put together. Again, not trying to say it's the same thing or that I know what it's like, because I don't. Just offering my rather disconnected and distant experience as insight from a different perspective.