I'm happily divorced from cars, so no more playing with those knobs for the time being. I sometimes go on a date with my brother's car, but it has very few knobs, and most of them do not lead to much pleasure. Even the radio is broken.
Whenever I feel the urge to fumble some knobs, I go to the kitchen and harass the knobs on my machines. And boy, do they give me some pleasure! And it's mutual, they get really hot. One of them goes from 0 to 1000°C in no time. But I have to be careful, if I don't grope two knobs at the same time, she can explode.
The other, much used one, is a real money maker. She gets handed around between my kitchen and the restaurant, where the girls give her some good action, too. Sometimes, when she gets too hot, she starts to smell funny though. Then we have to let her get some rest before exploiting her further.