It has been studied that that are infatuated with women with large booties normally possess a large penis. This is said because men with little dicks can't adequately reach a woman's vagina when they are in the doggie-style position and they have a large butt. Only men with larger than average endowment can properly pipe a womanwith a big rump.
"Big booty chasers" are normally prejudice against women with smaller booties and will only give notice to a larger
"I think he is mesmorized by her ass that is the size of Russia"
"Oh, he's a big booty chaser?"