Well kiddo, sometimes grown-ups have a different way of living their lives and doing things. Some grown-ups like to have fun and be with lots of different friends, and maybe even have relationships with more than one person at the same time. That's what some people call a "playboy lifestyle."
It's kind of like when you have a big toy box and lots of toys to play with, you might like to play with different toys every day because they all bring you joy in different ways. Grown-ups who live this way like to explore and have new experiences, which can be fun but also risky because it can be hard to keep track of so many things at once.
But it's important to remember that everyone is different and it's okay to have your own way of living your life. It's also important to treat everyone with kindness and respect, no matter how they choose to live their lives.