I sometimes walk by the red light district.
One time I seriously considered having sex with a sex worker.
I talked to multiple of them to find a click and I was appalled by all my interaction.
I realized that I wanted intimacy leading into sex.
What they offered: strictly penetrative sex and nothing else.
As I got older, another issue arose: to what extent is intimacy actual intimacy when you are paying for it?
Intimacy implies someone caring about you and you caring about him/her. That suddenly means it has an ethical component of idealism attached to it.
For me anyways.