When a guy makes that first move on the dance-floor in hope of action in the bedroom.
A Waist Pull won't give the impression he's gonna be an arsehole and treat her like a piece of shit...
A Shoulder Pull ie putting arms on top of the shoulders is the contrary - this tells a woman you are definitely going to be a hard cookie to crumble and a less sensitive soul for that night and thereafter - if.
A Shoulder Pull does however suggest the sex might be dangerously fantastic together though.. that's for sure.
His Shoulder Pull scared me and caused all this hassle."
The glorious feeling when you don't have paranoia or give a shit anymore about insults hurled at you and you also realize in hope that insults from a friend mean a mate who you could regain trust with having lost it in the early stages of paranoia.
It is also a salute your mutual ally in the field for making it over the line with no signs of post traumatic stress disorder.