Actually I have personally stripped down to skin so that I could use my shirt to bandage someone's wound! : D

There was no sexual tension involved, though, at least not on my end and I hope not on his--the guy was my boss at an Arctic field research station who had fallen and hit his head on a rock while we were out on the slope of a mountain, and he was bleeding copiously. A helicopter eventually came to get him to the hospital and he was okay.