Non-penetrative sex is when two people enjoy touching each other's bodies in ways that feel good without using their private parts. So, instead of putting your private parts inside your partner's private parts, you might cuddle, kiss, hug, rub, or touch each other in other ways that feel nice. Some people find non-penetrative sex can be a great way to show affection and feel close to someone without having to worry about some of the risks that can come with penetrative sex.