And seriously, bring your boyfriend or girlfriend to the sex club. There were plenty of couples, from 20-somethings to people in their mid-40s, being totally in love (OK, lust), roving around with eyes only for each other. You could see that the setting was putting a heavy dose of spice into the relationship.
Maybe this is creepy, but that was actually kind of touching.
6. But not getting involved is cool, too
Herein lies the beauty of Berlin: this is a city renowned for people doing whatever they want, without being judged. If you don't feel comfortable having sex in public, it’s no biggie. Hit the dance floor, hang out by the pool, and -- at the risk of sounding like your mother during a "birds-and-bees" talk -- do what feels right.
7. It's OK to be a peeping Tom
A little ogling at couples (or groups!) is totally fine. In fact, it can help getting the engine started for Rule #5.