Also, and I hope I don't come off as sexist, but I've seen women dunk their hair in the hot tub. I suppose longer haired men could do this too, but hair product can do this as well. We go to bed usually about 30 minutes after our hot tub soak each night and my wife doesn't want to go to bed with wet hair or half to spend 20 minutes drying it during our wind down time, so she puts her hair up. I get tension headaches in the back of my neck and I'll sit low enough that the hairline in the back of my head gets wet, but I try an minimize that.