john:
(plural: ‘johns‘)
a man who visits a prostitute, i.e. a man who goes to a woman who has sex for money,

a john (man in the car, haggling with a whore)
The prostitute was with a john when the police arrested her.
There are john schools run by the law agency in the US to warn the habitual johns about the legal and health problems they face for involving in prostitution.
When it comes to a debate on legal implications in illegal prostitution, female debaters support female prostitutes and male debaters support johns, quoting the fact that if there are no prostitutes, there are no johns and vice versa!
Most of the johns caught with whores are bachelors who look for exciting experience, but unfortunately, married men are also known to visit prostitutes as frequently as the unmarried.

a john (a toilet)
