A while ago I was advised to let other women show interest in me while my gf was near. That way I don't openly flirt in front of my gf but stil something between passive and active dread is created.

I was wondering how excactly you do that.

Aside from lifting,

1.what kind of mindset is nessecary to draw the female eye to you and make her give of IOI's? Without really trying.
2.What are the little subtle things you can do to bait that reaction from women or to catch her eye/make her feel an attraction spike.

I hope someone knows what I'm talking about and has experience.