Sexual intercourse and Sexual activity

Sexual intercourse noun - The act of sexual procreation between a man and a woman; the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur.

Sexual activity and sexual intercourse are semantically related. In some cases you can use "Sexual activity" instead a noun phrase "Sexual intercourse".

Sexual activity noun - Activities associated with sexual intercourse.

Sexual intercourse and sexual activity are semantically related. Sometimes you can use "Sexual intercourse" instead a noun phrase "Sexual activity".