He's just a small child and therefore pretty much gender neutral
Where did you get this idea that children are "gender neutral"? Just because they haven't reached puberty yet doesn't mean that kids are therefore "sexless". The point is that Hurley used a BOY to showcase clothing that is intended for GIRLS. Why couldn't she have used a female model for the bikini (perhaps a young niece or cousin)? Is she that cheap to bother with hiring one? I think it was terrible judgement on her part to exploit her son like that.