Why do girls come back around when you start talking to someone?

Something I’ve alway found was interesting is whenever I’m in a drought once I start talking to a girl. Out of nowhere girls I used to talk to that I might have tried shooting my shot with again while in that drought or that I might wanna reconnect with but never actually tried reaching out to in a long while seem to start coming back around. Even if they themselves don’t know I’ve started talking to another girl it’s like clock work. I’ve seen it happen a few times including with girls I used to talk to who are in relationships hitting me up to imitate something on the low. Have you ever had this happen?
Why do girls come back around when you start talking to someone?
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