I very occasionally offer quickies, but only if I'm having a quiet day and it is definitely my shortest booking. A client I'd bet before texted me saying he knew my rate for 15 minutes (as he'd had that once before) he then asked if he could do 10 minutes for less than half than what I offer quickies for. I told him that clients don't get to choose my rates!
Another utter dickhead really wound me up the other day. After oral he said he hoped I enjoyed it. I said I did. But then he went on about it. He said he hated to think I was just doing this job because I was desperate for money. For some reason this really offended me because I felt like he wanted me to justify myself. The way he said it wound me up so badly I snapped, which I very rarely do.