It's a titty fuck but but instead of the boobs it's the scrotum, and instead of the penis it's the finger
I'm about to Russian titty fuck the shit out of you with this finger
When Individual 1: Proceeds to lie down, balance and spin a bay-blade on their erect penis and Individual 2 proceeds to sit down on the the bay-blade and penis while it is still spinning, creating The Russian Spin Fuck.
Person 1: Hey I heard Josh and Sarah tried The Russian Spin Fuck!
Person 2: Damn I'm jealous that's my favorite sex position!
Person 1: Same!