Are you having natural sex? You might think so, but you’re probably wrong. Take lubricant, for example. Whether it’s coconut cream or mango delicious, that tube you stashed in your nightstand is probably chock-full of parabens, hormones, silicones and petroleum by-products which can cause irritation that makes you more susceptible to decidedly unsexy yeast infections. Ick. So what about toys? C’mon, don’t pretend you haven’t tried them once or twice—or thrice. Since Shades of Gray came out, they’re practically selling sex toys at Barnes & Noble. But they also can be pretty toxic.