Cowgirl

Cowgirl is the name of a group of sex positions in which the man lies on his back or sits, the woman straddles him and they face each other, and the vagina or anus of the receiving partner is aligned with the phallus of the inserting partner to achieve penetration.

NSFW example

Note: If the participants face away from its each other, then use the Reverse Cowgirl tag instead.