Yes you read that correctly. For the past few weeks I've been having sex with beautiful women without taking down their numbers. The optimal situation is to pull her on the spot, but I have a full life and that isn't always possible. After I approach and we talk for a minute or two, I'll suggest we hang out sometime. If I get a response I like, I'll tell her to take my number down and shoot me a text so I can give her a call later. This serves two purposes. It weeds out women that are just being polite, and it sets the frame of her sending the first message in the text thread. The dynamic is mutual attraction instead of you chasing. If she's not attracted to you she'll either not take your number, offer instagram, try to get you to take her digits without a good excuse like her phone being dead, or take it and never text you. No more time wasting or ego hits chasing dead leads. You deserve better than a woman that has nothing better to do but string along a man she doesn't like.