That's right. As best I can tell, the stocks were primarily for humiliation and leaving the offender at the general mercy of the public (and I'm sure tickling happened to occur at times.
Another example of "it probably wasn't what you think" are things like chastity belts, which for most all instances were probably Victorian era sexual novelty (much like today), based on older misinterpreted myths or literal interpretations of creative metaphors. Like tickling, I'm sure there was some few twisted freaks who imposed them onto others for real, but it wasn't a practice from what I understand.