Another woman here. I would never, ever, ever agree to a guy (a complete stranger) following me around while I shop. Just thinking about that gives me the heebie jeebies. I would, however, totally give a complete stranger my number to text for a while and agree to meet up on my own terms if he seemed cool over text. If you’re getting nothing but rejection, you might be coming off as a little insincere which in turn is a little creepy. Try having a conversation with women without seeing them as the end goal of getting laid. Talk to them like you would any other man/human being without an agenda. Don’t think “I have to ask to follow her, so I can talk to her, so she can be comfortable giving me her number so we can.....” you’re already planning waaay too far ahead and we women can sense that and yes it is totally creepy. Instead go with the advice of giving a complement and seeing if you can strike up a conversation organically. It can be the shortest conversation ever. Once it starts to die just say would you want to go out sometime? If the answer is yes, the number exchanging will happen naturally. I think you’ll be pleasantly surprised.