When I moved to a new city a while ago, I messaged this girl who I knew also lived there.
She was just a girl I knew through some people and had met at a few parties. She is a very cute chick who was into partying, so ever the long-term thinker, I decided I should try to friendzone her and go to venues with her just for the good banter. Hot chicks are like currency in the night life scene.
Anyways, she made lots of promises to meet up, but kept flaking. No big deal as I wasn’t trying to bang her anyway.
Sometime later I sent her a message
“Hey you should come to X tomorrow. It’s my girlfriend’s birthday”
Like a nuclear bomb set off, she suddenly seemed super interested.
OMG you have a girlfriend?!?
Shows up to the party dressed like her life depended on looking hot. Starts getting flirty, physical and says the dirtiest things to my ear. Invites me out the next day to “catch up”.
Alright, of course I didn’t slam her out of principal, I actually was with someone.
In hindsight, a tactical error to invite her out in the first place.
I could say preselection works. I could also say women are hardwired to be homewreckers. Choose your own lesson.
Inside The University of Melbourne 
You should have painted her cervix. #beta