Um … we are? I’m fairly well-read, and the use of clever turns of phrase is how I make my living (or was until the magazine closed), but I can’t say I’ve ever heard of the phrase, much less the person with whom you associate it.
I thought I remembered Richard Feynman inventing the phrase, see ‘Surely you’re joking Mr. Feynman’, or maybe R. Rhodes attributed it to him in ‘The making of the atomic bomb’.
However, I did a search on Feynman and “tickling the dragon” and got another hit, in an article on flutter in airplanes. So perhaps it has an earlier etymology meaning ‘a kind of risky experiment’
Not quite the same, or relevant, really, but I figured I’d share knowledge of a similar phrase used in WWI.
In the British raid on the Belgian port of Zeebrugge, the commander, Vice Admiral Roger Keyes was informed that the date of the raid would be St. George’s Day (Apr. 23rd). So he had his ship signal the other ships the message “St. George for England.” The message recieved from one of the ships was “may we give the dragon’s tail a damn fine twist.” A while later, one of the officers involved wrote an account of the raid titled How We Twisted the Dragon’s Tail. It’s one of relatively few books on the raid that I’ve never been able to find a copy of.
Of course, that says nothing about tickling, but does perhaps provide some info that could be of use.