There are 3 types of penetrative sex
Vaginal Intercourse- which is the standard type of sex when a man puts his penis in a womans vagina
Anal sex- Is when the penis is inserted into an anus (butt)
Oral sex- is when there is mouth contact with a penis or vagina, licking or sucking on it
There is also non penetrative sex (outercourse) when nothing penetrates your body, like hugging naked, mutual masturbation stuff like that