Let's face it — we're sexual beings, and most of us not in relationships are going to find a way to have sex. When you're hooking up with a friend, you don't have anxiety about something dangerous potentially happening when you go home with them because they're a stranger you just met. You know them, trust them, and feel safe with them, which is always important. It's also safer to have one consistent partner instead of multiple when thinking about STIs and sexual health.