Ways to look bigger in the shower rooms

Ok, so when I go to a public shower room I get so nervous that my fucking penis nearly vanishes. Now I´m not that big, but if I could just let everything "hang loose" I would be perfectly satisfied with what is my "normal length".

Is there any way to avoid that shrinkage? Would alcohol help or inhibit? It is so god damn annoying, because I am not that small, but every time I go somewhere I get fucking so nervous and fucking penis just shrivels up. nothing probably really what you can do, I am just desperate..

thank you

EDIT: Sorry for the misleading title, this is not so much a informational post than it is a question

I know how you feel because I tend to turtle big time when doing sports and going into showers after that is not something I look forward to, it looks like I don't have balls at all and I might lose 50% of my length too... Being nervous doesn't help. At the same time I think almost every guy (apart from the huge ones) in that shower room feel bit nervous about how their cock compares to others, don't stress too much. Try visiting toilet booth before showers to warm up yourself a bit and just relax. Don't yank your member too hard though it might get scared even more.

Confidence. Growing that from growing you penis larger in all measures. Obviously flacid hang length growth is the key one that shows in the showers. Perhaps learning kegeling and Reverse Kegeling so you can tire those PC muscles which are turtling you up, and RK to kinda push out so it doesn't pull in.

So general Penis Enlargement for length, girth too... knowing I'm bigger in that gives me confidence. The healing extended methods of Ujs-Uncle Jim's Stretch or Stealth ADS, and true ads devices like absilicons or similar, bungee leg strap stretchers... I do bikers lock hang and Stealth, rotate between the two because I wear Ring of Power or stealth... so I like the lock when in RoP.

The hydropumps may help as well, to expand and loosen your tunica and tissues, so your penis can grow in all measures...

So, do Penis Enlargement is the general answer. When you are more confident you have developed a "big" class penis your confidence in shower will change.