Another way to show pre-selection is to friendly flirt with other girls while your out on a date. Once I did this with the girl above.

WE was out and started asking the bartender why she was happy, and she started giggling and started making eye contact, we even started looking into each others eyes to see who would smile first.

The next day the girl, text me and was jealous, she wouldn't drop it. She even went on to ask if I got the bartenders number. Jealousy is always a good thing. This girl made so much effort to get me out again.

So my question is how can I friendly flirt with others girls while on a date. I think one liners are good here? or maybe some compliments, as Im not going to sleep with the other girls, I just want the attention so the girl im on with the date can see that other girls want me.