"can AI actually determine female vs male nipples?" Not with 100% accuracy, but on average yes, as a female breast is indeed quite different from a male breast

"can AI actually determine female vs male nipples?" Not with 100% accuracy, but on average yes, as a female breast is indeed quite different from a male breast. Shape, hair, size, ... But there are of course exeptions. Muscular women, with small breast who did not breast feed yet, are probably quite hard to detect.