I mean "chat" as in messaging back and forth online. Also, one other reason not to give out your phone number until after that first short coffee date - dick pics. Yeah, they're a thing.
Online is just like being at a party and bumping into someone interesting. The coffee date is that part where you sit down on the sofa at the party and talk to each other a little bit. THEN if you're still interested you can give him your number and hopefully he'll call for a real date.
Excessive chatting online can lead to feeling like you're already starting a relationship - making the gap between fantasy and reality all the more crushing when you meet in real life (and stickier to get out of).
