Wow I would definitely not be confident enough to do this kind of things. Are clients asking for these things mentioning it when they book you or do you just go with the flow during the booking ?
They mention it in the booking and I go with the flow once the additional funds are in my hands cash or sent transfer and it reflects then I do the W.S or the Fart. The one of the bathroom toilet it is random on the spot. I have become used to it guy chatting to me and I chat to him while I am doing number 2 that I don't charge so its all fine with me.