Is there any other reason why she did this?

[brahman]

This girl I like went up behind me when I didn't see her and she touched the bottom of my leg with her foot. I looked down to see what touched me and saw her behind me wearing some sexy skirt showing off her legs.

 

Would a girl do this for any other reason, but to show me her legs.

[Keyman]

Dude, stop telling us all about it and focus your efforts on flirting back at her...

[Sonicxman]

It's obviuos, she flirted with you.