Indicator of Interest or IOI

When you are talking to a girl, she will give you IOI (indicator of interest), a pick up artist can pick these up easily.

The rules say that after 3 IOIs you can go for a kiss.
Examples of IOIs:
1. If she asks your name
2. If she laughs at jokes you say, that aren’t that funny.
3. If she starts playing with her hair
4. If she tries to hard to gain your attention.