I've got my insulated overalls, jacket and boots. It's pretty warm even in the minus 20's.
Taking a piss isn't very fun though. Imagine your penis. Do you have a mental note? If not, imagine Lexington Steele's penis.
Now imagine taking your penis out when it's freezing and the wind is blowing. Your penis will be like "WTF dude, just let me piss in these comfy pants next time you psycho!"