Source : Webster's Revised Unabridged Dictionary (1913)

Titillate \Tit"il*late\, v. t. & i. [imp. & p. p. {Titillated};
   p. pr. & vb. n. {Titillating}.] [L. titillatus, p. p. of
   titillare.]
   To tickle; as, to titillate the nose with a feather.

         The pungent grains of titillating dust.  --Pope.

Source : WordNet®

titillate
     v 1: touch (a body part) lightly so as to excite the surface
          nerves and cause uneasiness, laughter, or spasmodic
          movements [syn: {tickle}, {vellicate}]
     2: excite pleasurably or erotically; "A titillating story
        appeared in the usually conservative magazine"