Berks County Temperature Check
When a female is performing oral sex on a male. The male inserts his fingers into the asshole of the female. The male then forces the females head down causing her to gag. The gagging forces the female clench her core muscles causing the asshole to clench down on the males fingers.
Last night Jenny was giving me head. I gave her the Berks County Temperature Check. And I blew my load in her mouth.