I have always followed the general rule of thumb to not contact a girl who I get their number for a couple days. It's something I always considered fairly standard practice for most guys. The rationale behind it is you don't want to come across desperate to the girl. Recently, I asked a few of my close females friends what their opinion of it was. Surprisingly all of them said they like it when the guy texts/calls them the next day. It's a flattering change of pace and leaves the impression that the guy does not like to play games. I'm curious what everyone here does. Do you wait a couple days or just play it by ear and contact them the next day if you feel like it?