Breast is best to feed a baby if you're at the doctor's office, but obscene if you are in a library in Idaho?

Why aren't male chests just as obscene as female chests according to

"Section 18-1514 – Idaho State Legislature"

https://legislature.idaho.gov/statutesrules/idstat/title18/t18ch15/sect18-1514/

"TITLE 18
CRIMES AND PUNISHMENTS
CHAPTER 15
CHILDREN AND VULNERABLE ADULTS
18-1514.  OBSCENE MATERIALS — DEFINITIONS. The following definitions are applicable to this act:
1.  "Minor" means any person less than eighteen (18) years of age.
2.  "Nudity" means the showing of the human male or female genitals, pubic area or buttocks with less than a full opaque covering, or the showing of the female breast with less than a full opaque covering of any portion thereof below the top of the nipple...."

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"Idaho law requiring libraries to remove materials deemed obscene..."

https://www.khq.com/news/idaho-law-requiring-libraries-to-remove-materials-deemed-obscene-goes-into-effect-monday/article_91166eea-3835-11ef-bef2-e3509eeecdee.html