I think a fling would absolutely be a good idea, as long as it was with the right person. [He smiles ruefully.] You have no idea how much I wish I could oblige! Ianto wouldn't even mind, I'm sure.
[Well... possibly.]
Seriously, though? You got shot by a date? What did you do to him??? [Deliberately playing up the incredulity, so as not to let things get too serious.]