Anal sex is any sexual activity that involves the anus. It does not always mean penetration with a penis. People can use sex toys, fingers, or a tongue. People of all sexual orientations and gender identities can have anal sex.
You need to relax the sphincter muscle of the anus — the muscle you squeeze when you need to poop but have to wait — to receive anal sex. So it’s important to try to stay relaxed as you explore anal sex by yourself or with a partner.
Unlike the vagina, the anus does not self-lubricate. You need to use a lot of lubrication, whether you use fingers, a sex toy, or a penis. It will help you avoid tearing or other injury to the area.