I had a very interesting experience recently. I was at school about to buy a coffee and I see a friend of mine. He's with several friends that I don't know. One other guy and 3 girls. I start talking to him and at one point I make eye contact with one of the girls. She's slim, dressed well, and very cute. I hold eye contact with her and she does the same. It felt like ages passed. I just held my slight smirk and looked her straight in the eye. We were probably 10 feet away from each other. Finally her face began to crack into a smile and she looked down and took a drink of her coffee, smiling. It felt exhilarating. I felt like we had a whole conversation with just our eyes. Yohami expressed it perfectly, we were "tasting" each other with our eyes. After that I returned to talking to my friend like nothing happened. I didn't even look back to her. Just finished talking to my friend and left.
I eventually cross paths with her again. Once again she's with my friend. This time I tell my friend to introduce us. She's all smiles and once again drinking greedily of my gaze. I propose that we all go get a drink together, but my friend can't go. She looked eager when I offered, but then when it turned into just being the two of us she balked. Afterall, we hadn't even talked yet, we had merely been introduced. I didn't try to insist that she come, so I don't know if she would have. I just tried to act completely indifferent to her saying no. After we talked for a few moments I said I had to go and I left.
She's been stuck in my head since this happened. Just some eye contact and some smiles, but it's powerful stuff. I know she felt it too.