Stealthy Non-Verbal Come-On Communication Methods

While shaking hand the other day as I was getting introduced, I felt this very subtle squeezing pulsations. Precise meaning was strangely clear to my astonishment.

Mahbe I’m naive but aside from whatever the complex extracurricular firing and misfiring of signals etc that went on at the time that I had no clue, I was simply fascinated by this newly encountered communication method that I thought, wow I never felt this kind of come-on signal before.

Nothing happened… as those people left the restaurant as we went in… except I think my friend, who introduced us, was rather miffed when I told her about the said “pulsations”… :dubious: Obviously it would’ve been very creepy if it was from a creep but wasn’t at all.

Have you ever received/felt this type signal from a handshake before?

What other stealthy non-verbal come-on signal transmission methods are there other than generic & obvious shoulder touching, etc?