If anyone, male or female spends an entire first date obsessed with an ex, it means two things:
1. They still either love said ex and/or want to be with said ex.
2. You are being used as a replacement for said ex and you have a very long hill to climb from the getgo that you usually have no chance of ever actually climbing.
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Never underestimate the power of stupidity in numbers. ~War13104
Never stoop to the level of idiots. They will drag you down and beat you with experience.