'My ex was...'

Back to the latent insecurity in women, don't ever bring up your ex, no matter how many times she talks about hers. And believe it or not, it makes no difference whether you're putting the ex on a pedestal or slamming her into the ground. The former will make her feel insecure about you straying back to the vixen and the latter will make her wonder about how badly you might talk about her should you'll break up!

Also, please never mention that you cheated on your ex if you did.