ML, an online buzzword, is short for makelove, which means making love. On the Internet, the word' making love' is often homophonic in most chat sites, so it is replaced by ML.

Sex refers to the mating behavior between the opposite sex of hermaphroditic animals. Different from other non-sexual behaviors, sex needs the participation of reproductive organs to stimulate excitement. From a biological point of view, animality is an act inspired by instinct and sexual desire.

Human sexual love refers to sexual behavior between people, which is more social, emotional and enjoyable than simple sexual intercourse.