I just came back from a quick 7-miler outside and it was at least -4celcius, not much wind. I warmed up quickly and didn't feel cold.
When I got back my dick and balls were like ice and its very uncomfortable.
I was wearing a double long sleeve top layer, gloves, a hat and shorts. The short kind with built-in underwear.
What do you guys do to keep your balls from freezing off when it gets cold outside? At what temperature should I stop wearing shorts that provide only a thin layer?