This worked for me but I didn't do it with every client who wanted to spend time with me, it just clicked into place naturally with one and was only 'temporary' (I had a variety of things to resolve in my life). Now a fair few years into marriage! A year or two before this I did also became friends with another client, but this was on a clear "there'll be no other bookings basis" and no romantic involvement I knew it he knew it.

I have let only a couple through the net but purely for sex and it's not something I do lightly.

They were also married anyway so couldn't and wouldn't want it to go any further

I think it's only human/natural that friendships can end up forming.

I know people in other sectors that have become friends with customers/patients etc.

Doesn't make it ok but sometimes it can't be helped.

I don't consider any of them to be friends.
Once they've left they're not thought about until they next contact me.

I have been doing this for a while now but I have found myself making friends with a client.

I have heard the "Pretty Woman" tale of girls marrying clients, I don't think that it is like that.

Usually, I don't let them cross the barrier but I think that we get on like a house on fire.

Am I being foolish?

I know girls who have married clients.  Big mistake. I know girls who've had babies with their married clients.  Guess who's holding the baby alone and guess which one is living his best life?