I seriously doubt they're marketed to little girls. They appear to be filling some novelty niche market. My guess is college students/frat boys and generally unmarried guys in their 20s. I find it surprising that these girls are recognizeable enough to warrant having a doll made.
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"All my years in p*rn didn't quite prepare me for childbirth. I mistakenly thought all the stretching I did would make this easier."