He nodded and tugged Sherlock a bit closer. John looked up at him, his face full of innocent curiosity. He had never been allowed to examine a two finner like this. He licked his lips and leaned in to taste the fluid from the tip, wondering if it would taste any different.

John then pulled back, pondering over the taste. A little different.

"Mine are inside." He answered. John knew in theory he could gave sex with a female of his kind and get her pregnant. But he wasn't sure of all the mechanics of it.