Why image generation AI's are so deeply censored?

I am not even trying to make the stuff that internet calls "nsfw".

For example, i try to make a female character. Ai always portrays it with huge breasts. But as soon as i add "small breast" or "moderate breast size", Dall-e says "I encountered issues generating the updated image based on your specific requests", Midjourney says "wow, forbidden word used, don't do that!". How can i depict a human if certain body parts can't be named? It's not like …

artificial dall dall-e example generation ai image image generation image generation ai internet nsfw small