double devious
When a story told is lead with a decent innuendo, goes on to be totally unsexy and finally reveals a naughty surprise.
Alex: Where might you hide your underwhear?
Alex: Ah yes, that's right, I'm afraid wearing it on your person is the least hygienic option since it will become dirty.
Alex: Oh I don't even wear any for that reason.
Dana: Such a double devious this story.
Alex: Ah yes, that's right, I'm afraid wearing it on your person is the least hygienic option since it will become dirty.
Alex: Oh I don't even wear any for that reason.
Dana: Such a double devious this story.