Can you be both a child at heart and also an old soul?

I'm curious because i kind of feel like I'm both sometimes.
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I'm a little kid around animals, I can get really energetic around a SO and maybe have too much energy when I first meet up in excitement. I do have a very mature side too. Candle lit dinners, slow dancing on a clear summer or spring night, investing and enjoying her hobbies with her, stuff like that. I can be really excited or chill and it's pretty controlled overall but I definitely act like a kid when I get really excited by surprises and stuff like that lol.
Can you be both a child at heart and also an old soul?
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