### Comment:
Can you describe some popular sex positions for couples?

### REPLY:
There are numerous popular sex positions for couples, including missionary, doggy-style, cowgirl, and 69. Missionary is a position where the receiving partner lies on their back, and the penetrating partner is on top. Doggy-style involves the receiving partner being on their hands and knees, while the penetrating partner enters from behind. Cowgirl is a position where the receiving partner straddles the penetrating partner, facing them. 69 is a position where both partners engage in oral-genital stimulation simultaneously. It's important to remember that consent, communication, and mutual pleasure should always be prioritized in any sexual activity.