Why do the most girls/women have bubble handwriting?

I always wondered why girls/women have bubbled handwriting. I was always a kind of sloppy handwriter and seen a lot of girls write in bubbled form during school and even all my friends growing up had this type of handwriting. I always wondered why? Example writings like this..
Why do the most girls/women have bubble handwriting?
Why do the most girls/women have bubble handwriting?
( I found these on Google Images).. So girls do you have this type of handwriting? And why is it? Were you learned to write this way or was it natural for you?
Why do the most girls/women have bubble handwriting?
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