The main myth that comes with body hair is that it’s unhygienic. While a lot of people state this as a reason for getting rid of it, there is little to no evidence that suggests body hair is unhygienic. As long as you’re maintaining your personal hygiene, it shouldn’t matter whether you’re fully shaved or leaving your hair au naturel!
So we know that it’s not unhygienic, but does body hair make you sweat more? Not necessarily, no. But hair can hold onto moisture, so you may find that when you do sweat, it stays a little more damp than when you’re fully shaven.