[Varda]

Too bad it’s not a joke or blunder. They mean to confuse the issue and there’s no pushback. People are too poorly educated or don’t care.

[Dr. Sivana]

People are too poorly educated or don’t care.

Also, some people think it is less "dirty" use the term instead of the correct word, "sex", which has come to mean "coitus". The word "dating" also often means that, as does "seeing someone".