Why are guys obsessed with huge butts?

Why are guys so obsessed with huge butts
I got dumped because my ex said "your ass isn't' big enough"
I don't understand why that is such a huge issue
Why can't little booties get some loving too lol
Now I feel like I will never get a boyfriend unless i get slim thick (right now my bum isn't too phat but i have a little tummy but I kinda have curves)
Why are guys obsessed with huge butts?
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