Turtleling for me means my penis just shrinks a little. Could be that I am cold or had a good PE session. The penis can do it to protect itself and to keep warm. Retracting into the body…I don’t know what that would even look like. Haha. I consider anything less than my best flaccid, turtleing. I have been experimenting with using medical wraps to keep my penis extended when I sleep. I just have to make sure that blood flow is not restricted.