If this is a serious question which I'm beginning to think might not be

Its not about numbers and in tescos its always the same IOI all the time. Its important to remember clusters using body langauge terms now. If a girls licking her lips it could mean shes just eaten something tasty but if this is done in combination with eye contact, flicking her hair, shes smiling, you make a playful comment/joke and she laughs and exposes her neck slighty, I think given the situation that took place last monday night Sarah was up for it, but I'll never know for sure.

I tend to strut round the aisles like own the place, thanks to new found confidence which usually invokes a fair amount of eye contact, smiles and hair flicking, but i've never bothered counting IOI.

Being aware of the signals is where 99.9% AFC fail.