This is actually getting pretty scary if you think about it. The only reason I can imagine they would ban your comic for lower abdomen hair is because they believe it will lead the reader's mind further down the happy trail to the genital region.
This mentality was common a few hundred years ago. People were required to cover their genitals and nipples because sexuality was sinful. Then they had to cover thighs, belly and chest because those were all areas that people believed would remind people of the "sinful regions".
Then people were required to cover arms, lower legs, wrists and ankles because these were all body parts that they believed would lead the mind to the bodyparts nearby, which would lead the mind to the "sinful regions".
It's very dangerous thinking and more often than not it aimed to silence womens sexuality. The prude wave we see going on online right now does this too. It attacks sites and content that is aimed at women and the lgbt, or contains characters thereof, shutting out more and more content under the excuse of it being "too sexual", while straight up pornographic content aimed at cis men is as easily obtainable as ever.
Big brother Apple wants us to cover our ankles to diminish the slightest thought of sin.