Sex is free, you can just look around and you will find one, you don't have to pay for that. But providing service is different, service is a talent that we acquire and develop along the time and we master it, some people waste it and some used it for living.

I can provide intellectual conversation, you can share your problems, worries, doubts and secret with me. I can shower you the emotion, validation and support that you need. Sex is not always the answer of our loneliness and frustration and we cant share our skeleton to those people that we knew they can use against us.

Try it, sometimes deep conversation in a dark room with a candle light left hand holding glass of wine and right hand on the right place of our body can keep our sanity.
I have mastered this talent and i do it for a living.