I did my first watersports with a client, but as I was on top I was in control.
In my private life I had done A a few times but I don't like it, it is not painful it just does nothing for me.
Initially I didn't offer A with clients, eventualy one of the nicer clients asked and I charged £30 extra, once I have relaxed and they are inside its a lot less personal and avoids having to kiss them, alas ocassionally its messy.