Poe was working hard to be very considerate. The last thing he wanted to do was convince Finn that this would be an unpleasant experience for him, because on a very basic, utterly thoughtless level, he wanted Finn to enjoy - (putting it bluntly) - sucking his cock. That was very much an endeavour that should only receive encouragement.

But the part of his mind that was thinking, and for the most part had nobler intentions, just liked Finn too much to want to push it. Not now. Later maybe. Later, after they'd had a few rounds, and Finn had bitten hard into his inner thigh and left a dark, purple mark--

He moaned, his thoughts having gotten away from him and gone in a very, very arousing direction.

"... barely gone even four days, and missed you so much," he whispered, the words almost lost in the sound of the water hitting them and the floor.