Curious question about Facebook algorithm on handling NSFW content

I tried uploading a random nude video by unknown star in poor quality, facebook did not let the upload completes, stops there and banned me for few days from uploading/sharing contents.. but I also see some videos where woman explicitly breastfeeding their babies. Their videos are not banned from upload..

How does Facebook algorithm classifies nude video and woman breast feeding kids videos? Please help me understand this

P.S: Don't dm me for video 😜