To put these panels in context, the Elongated Man (who, I believe, got his super powers from a secret soft drink ingredient) has been captured by the nefarious Bredans and turned into a kota. As a result, he's forgotten he's the Elongated Man, and can stretch his body to incredible length. The Flash, as quick of wit as of foot, decides to tickle him in order to "jog" his memory.
That second panel is ovbiously flawed in many ways, from the unfortunate placement of Elongated Man's body to the fact that a major A-list superhero is tickling a C-lister -- but I think it's use of the word "titillating" that's the most troublesome aspect. (Scanned from The Flash Archives Volume 3)