Isn't it true for all people, not just girls? What is that saying in English - plenty of fish in the sea? Never be hung up on any one person. Keep moving on till you find someone who reciprocates. As crass as the analogy it's a healthy attitude to have.
I have a completely different and more accurate saying about women. There are three confounding things that no one will ever figure out - cling wrap, fitted sheets, and women.
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