Originally I posted a response (6/14/12) on comment_fic LJ community to a prompt by iantojjackh - Torchwood, Jack/Ianto, "Don't ever call me old man again."
I reworked the comment fic into a 100 word drabble and so here it is.
They lay side-by-side panting after a vigorous shag.
"Out of breath?" Jack teases him.
"A little. Although…" He looks down at his half-interested cock smiling. "…I'll be up for more in a minute." Then he glances at Jack's flaccid state, smile turns into a smirk. "How about you, old man?"
Jack growls, "Don't ever call me old man again." He launches himself on top Ianto, rubbing his suddenly hard cock against Ianto's thigh.
"Remember, I have immortal recovery."
Cachu! Ianto should have learned his lesson by now, but it's so much fun learning it over and over and over again.