Duppi, a brown flash-animated entity in cat form, wears a green hat for Saint Patrick's Day. He sneaks up behind Saturn in his rabbit form, and pinches his bottom for not wearing green today. Saturn reacts with a shocked, aroused blushing expression, while Duppi has a mischievous grin.
Alt to the first pic; as an involuntary response to the pinch, Saturn releases a large, green cloud of flatulence directly into Duppi's face (hey, at least SOME part of him is green now). The stench of the "BRAAPPP" has Duppi cover his nose in disgust (and barely disguised horniness) as the force of the fart sends Duppi's green hat flying into the air.