And, FWIW, boobs are SFW as well. At least in the USA.
While you are technically correct, the term has an exact meaning in internet culture.
The term "safe for work" refers specifically to a lack of sexual and...medical... content. Looking at cat pictures might get you fired, but it's still "safe for work".
I didn't mean boob pictures, but actual boobs. As in breastfeeding.