Theya re all the same mate but a hot tip for brownie points...
She tries something on, all is well then she doesnt buy it (WTF) then she starts looking elsewhere!!! While that is all going on, tell her you are nipping off to the loo and go back to the shop and buy what she had tried on but didn't buy (WTF) and then at the end of the shopping trip when you are in the car on the way home and she is disappointed because she didn't buy anything coz she couldn't make a decision for herself, you present her with what you have bought for and, and you are in the good books for at least an hour HAPPY DAYS!! And if she did buy a load of stuff, you can either take it back or give it to her anyway, or just save it for the next time you might need some brownie points!!!