People doing the nasty is a euphemism for sexual intercourse. It is a common phrase used to refer to the act of making love or having sex. The term can be used in a variety of contexts, from casual conversation to formal writing.
There are many reasons why people engage in sexual activity. Some do it for pleasure, while others do it for procreation. Sexual intercourse can also be a way to express love and intimacy. Additionally, many cultures and religions view sexual activity as a sacred act.
