I was in Turkey a while ago, and encountered sit toilets with taps (edit: taps controlling a nozzle a wee way below the rim making a little fountain from the back to the front inside the bowl). While I was brave enough to turn the tap on briefly, I was perplexed that the stream wasn't particularly forceful, so it's obviously intended that one uses one's hand, but since toilet paper was provided, I didn't need to experiment.
My question amounts to: how does it work? Is it basically the same leaning to one side to wipe? If so, do you follow up with soap both on hands and derrière, or... how do you know which towel to sully? (Edit: aside from it being a chilly experience, I don't want to end up with an uncomfortably and embarrassingly wet bottom or find myself having used over half a roll to get dry, or use the wrong towel, assuming there's one even there!)