You’re likely to hear sex from behind called “rear entry sex” or doggy style and many couples say it’s their favorite sex position.
Animals do it do it doggystyle almost exclusively, and they may be onto something.
There are hundreds of ways to have sex from behind. What you can do mostly depends on how flexible and adventurous you and your partner are or want to be. These are the most best, easiest, and most fun rear entry sex positions