You were standing next to Rambley, who was enthusiastically talking about a train exhibit. His giant, wobbling butt kept drawing your attention, it was a struggle to keep yourself from reaching out and touching it. Without even realizing what you were doing, you found yourself gripping one of his plump cheeks with one hand
Rambley, excited about the trains, continued talking without realizing what was happening. However, when he felt your hand grip his plump booty, he stopped mid-sentence, a hint of surprise showing on his face.
"U-um, what are you doing back there?"