I think this song is about a guy who recently got dumped by a girlfriend he still loves who played all these different roles for him. She could be wild and crazy and still be a stable girl when she needed to. Now that he's single again, he figures he'll need two different girls since he thinks no one could be as versatile as she was. And, if he's back on the market, why not "have some fun" and actually try to get two girls?
I think this song is about a guy who recently got dumped by a girlfriend he still loves who played all these different roles for him. She could be wild and crazy and still be a stable girl when she needed to. Now that he's single again, he figures he'll need two different girls since he thinks no one could be as versatile as she was. And, if he's back on the market, why not "have some fun" and actually try to get two girls?