Three days ago my hot water tank went out, so could not shower for 3 days. If I'd have been a "guy", I know I would've stunk by the end of the second, if not before. (I drive, but even mild activity like that causes one to sweat).
I went the 3 days without anything but sponge-bathing the "highs and lows" (hands, feet, crotch, etc) and could've gone another couple without any worries. As a guy, that wouldn't have helped the odor issue.
Especially my hair...it looked just as clean and good-to-go as the first day.