system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why, after taking long showers, do we feel dried out? What makes the moisture leave our skin?
gpt
Imagine an extremely hot and humid day. Once you step outside, you'll be drenched in your own sweat immediately.

Being in a hot shower/bath/pool is almost the same environment. You're still sweating large amounts but you don't feel it because the sweat is washed away immediately.

Since you are losing water through sweat during the shower, you feel dried out. This can be dangerous if you stay too long in the shower/pool because being in water reduces your sense of thirst and you can get dehydrated.