Percy stays and watches.

As Percy watched in shock, the two nymph's cocks touched. Percy could feel the sparks from all the way over there, as the nymph's passion seemed to double.

Percy racked his brain for the nymph's names. He was probably one of the most knowledgeable people in the entire world about nymph names, given the amount of time he spent underwater doing...things. Was one of them Echo? He thought so.

Maybe that's one of her friends.

All of a sudden, Percy's mind connected. It was as if he became conscious of the nymph's minds, as if he could feel their thoughts. It was all too late however, that Percy realized the Nymph's also connected with Percy, and were, at that moment, glaring straight at him.

Oh crap...