She's tricky like that...just don't let your guard down. You'll start to relax then the next thing you know you'll be staring at the ceiling from floor level, your junk will ache and all you'll hear is Tina laugh in the background...
It's Glam who does that here, but I wouldn't put it past Tina, either.

Liscab used to goad on Glam and other ladies, and when he stopped coming so often, OB kinda took up where Lis left off.