I don't think the bodies and the movement are the only factors. The camera zoom, cropping, and background music is also relevant. I find a zoomed crop slow-pan

I don't think the bodies and the movement are the only factors. The camera zoom, cropping, and background music is also relevant. I find a zoomed crop slow-pan camera shot on an 11 year olds crotch in jeans pretty strange. After having seen similar shots in numerous music videos involving adults, I tend to think it's sexual particularly when the background music is sexually charged I don't think "it's not an adult body, so it's not sexual" is a very compelling argument all-up.