Sherlock had been licking at John's stomach. When he moved back down, he felt John's erect penis press against his cheek.

"Damn. John." He said softly. "Can you guys.. have sex... very quickly again afterwards?" He touched the cock gently, he still couldn't get over how it looked and felt, it was so unlike his own.

God.. what would it feel like in his mouth or...

No, he couldn't think about that. There was no way that it would fit, he wasn't built for the penis of a fishman.