Yes, if you mean anal sex using the penis. The body of many people is flexible enough so that they can, without any doubt, perform anal intercourse head-on. When two men are lovers, if they want to perform anal intercourse, they could do it facing each other, but only in one way.
It would be almost impossible for them to do it simultaneously. In the case of two women, if they wish to experience anal penetration, they should use their fingers or vibrators, and they are likely to achieve facing each other and simultaneously. Actually, any type of couple can use their fingers or vibrators and try it face to face, if that is what they want.
Does anal sex hurt?
It can be painful. The anus is not very elastic. The forced introduction of any object can cause rips and pain. This is why it is strongly recommended that a lubricant be used and that the penetration be done smoothly. In this way, any tearing and pain can be avoided.
Why do people have anal sex?
Because the entrance of the anus has many nerve endings, which causes sexual pleasure.