It never fails. You’re out camping and right in the middle of the night you feel an irresistible urge to go pee. The outhouse is only a few steps away, but you dread losing sleep momentum by getting out of bed and scavenging for your shoes and lamp. You ignore it for a while. Yet, it keeps you awake. The pressure is too strong. It’s nippy outside, and getting dressed is a hassle. You eventually surrender.