Female purity is a notion invented by men.
"[The monogamous family] is based on the supremacy of the man, the express purpose being to produce children of undisputed paternity; such paternity is demanded because these children are later to come into their father’s property as his natural heirs." Engels, The Origin of the Family, Private Property, and the State.
In reality most 'sex work' involves creating images which will be on the internet forever.
Having sex in a venue controlled by a man can create those images too. Remember that thread someone made about the tiny cameras? If it's his flat or bedroom, or even if he got to a hotel room first, he could have rigged it with cameras.
I'm glad I don't have kids, I couldn't bear them growing up into a world like this.