Not necessarily.

If anyone is paid for sex, it's prostitution.
If anyone is married and has sex with someone other than a spouse, it's adultery.
In someplaces, anything other than intercourse is illegal.

The list goes on.


>I don't understand how the authorities can be launching
>a criminal investigation. It might not have been moral,
>but how is it illegal to have a sex party, so long as
>erveryone is a willing participant?