when it's really really really super hot and you can't do anything in your apartment except sweat, go to the local pool 10 minutes before it closes, smile and wink, and in really bad italian, ask the shirtless long-haired tanned life guard if you can just have one quick jump in and out. it feels glorious. it's refreshing. it's free. it's spur of the moment matto.
but then, as arina pointed out, you bike back home and the only difference now is that it's still hot and you're wet with stinky chlorine on top of the incessant sweat.