My Balls always Getting Stuck In Pump?

[Csp_18]

Hi

I bought I electronic air penis pump. But While I am pumping, I often find that I get my balls sucked in there. I have a feeling it may have something to do with the sleeves or add more lubes? How to prevent ball sack skin from getting absorbed when pumping?

 

[CatInATrenchCoat]

Make sure there is no lube on your balls, they have to be completely dry, other than that, maybe your cylinder is too big