Is there an under ground network or something??

Now this is not something that I am currently dealing with, but if you are a female, this HAS happened to you in your life time.  There you are going through life, you have a boyfriend, and either you break up with him or he breaks up with you, whichever, and BANG! It's like the breakup heard 'round the network of all of your ex-boyfriends, ex-booty calls, guys who have had an unrequited thing for you for 25 years... ALL of them hear it and start blowing up your phone, your Facebook page, any way they can these guys are contacting you.  What is that?  How does that happen?  And it does, every time.  This is not an "I'm so cool, so many guys want me" thing.  It is a FACT.  This happens to EVERY ONE of my girlfriends, break up, and all the past guys crawl out of the woodwork. I have a theory.  Its a bad theory, and probably completely false, but it is the only conclusion I can come up with;  There is a guy code that states that if you are dating a girl, you HAVE to get the names and numbers of all the guys from her past, and you are mandated, punishable by death or castration, to inform all of these guys effective IMMEDIATELY once breakup has commenced.  Is that it?  There has to be some sort of reason for this!