Tire Change
Requesting a condom change between taking it in the ass and giving a blow job. The phrase originated from the slang term, "rubber" which refers to a condom.
While Bernie was well known for his sexual exploration he did have some standards. Anyone going ATM was going to have to do a tire change.
European Tire Change
An European Tire Change is when you are fisting a partner (anal or vaginal) and have to swap hands due to fatigue. The key is not to ruin the flow by abruptly removing a hand, instead you insert the second hand while the first hand is still engaged, removing the initial hand ONLY after the second is in position (making it a perfect pit stop).
My partner performed a flawless European Tire Change last night, if it weren't for the wedding ring I wouldn't have even known he switched hands!
changing tires
When two or more people soil their own underpants, swap them and then soil said underpants in the other manner.
David and I bonded on a new level by changing tires. We thought we were just merging scat but we were actually fusing souls.