I love taking cold showers but the penis isn't as stretchy after a cold shower than a hot shower it seems like my penis shrinks in this I'm guessing it kills the gains when you are resting?
Keep enjoying those cold showers! Prior to a session it is better to warm up your penis though, but otherwise cold showers are relatively more beneficial to your health. Keep on gaining!
Let's say you just stretched your dick and it's nice and stretchy afterwards. Than you take that cold shower, it shrivels up and isn't stretchy anymore cause of the cold