Sometimes it's so subtle...
Yesterday I got a call from an Italian, so I immediately gave him a bit of leeway on the language front. The initial booking arrangement was fine, but as he set off from home he rang me again, and started asking what we would do etc. I began to get a slight tingle in my internal dodgy client detector, especially when he mentioned anal, which I'd told him initially I don't do.
Anyway, he turned up, and was OK, though a terrible kisser and unpleasant breath. At the appropriate time, I asked if I should get a condom, and he said no, not yet. Then all of a sudden he climbed on top of me and tried to start having sex! I pushed him off and got the whole, I'm clean, I don't like condoms spiel.
The weird thing was not so much that he tried it, but his attitude when I told him off. It seemed completely bizarre to him that I should insist on using a condom! Shame is that otherwise he was OK, in a quirky sort of way.