### Comment:
What are some popular sex positions for couples?

### REPLY:
Some popular sex positions for couples include missionary position, doggy style, cowgirl position, and 69 position. Missionary position involves the man on top, while the woman lies on her back. Doggy style involves the woman being on all fours, and the man penetrating from behind. Cowgirl position is when the woman is on top, facing the man. The 69 position involves mutual oral stimulation between partners.