My question was inspired by the phrase in this question:
draco dormiens numquam titillandus
...where titillo presumably refers to the action of "tickling."
Is this use of titillo attested? Lewis & Short gives that as one of the English definitions, but all of the examples I can find correspond to the figurative English meaning of "tickle," i.e. "titillate."
I cannot find a single classical example where this word is used to describe the literal action, which leads me to doubt whether the above phrase would have provoked a strange reaction in a Roman.
Is there any justification for the use of titillo outside of its figurative sense of "titillate"?