Cup The Sack

Holding onto someone's Sack (balls, testicles, etc), usually done while giving a blowjob or handjob. Sometimes done by a third-party during a threesome. Can be done tenderly or aggressively, depending on the mindset of the person doing the cupping. Usually the precursor in sex before deepthroating occurs & a sign of good things to cum.

Yea, Baby... after you lick the shaft & cup the sack. Could you take me all the way & lick the back of my balls? Would it be too much to ask?