Ironically, birds also have a non-zero chance to be called "tits", "boobies" or some such equivalent. Whoever named those must have been very proud of being a mammal and wanted to rub it in for those poor birds
I know you think this set of boobs is important now, but those boobs will be replaced by another set of boobs. Boobs will come and go. And then, someday, you'll meet a pair of boobs that you want to marry. And those become the boobs that matter the most.
In Greek mythology, Zeus places his son born by a mortal woman, the infant Heracles, on Hera's breast while she is asleep so the baby will drink her divine milk and become immortal. Hera wakes up while breastfeeding and then realizes she is nursing an unknown baby: she pushes the baby away, some of her milk spills, and it produces the band of light known as the Milky Way. In another Greek story, the abandoned Heracles is given by Athena to Hera for feeding, but Heracles' forcefulness causes Hera to rip him from her breast in pain.
That Zeus. He’s such a character. Not only does he sleep around on Hera (you know, his sister wife), but then surreptitiously tries to get Hera to breast-feed his bastard son. But I digress…
It is admittedly pretty weird that a whole group of species developed a baby-juice organ that is only used by the females to feed only the young babies.
it's incredible that this wasn't obvious to that person from the moment they heard the word. that's like having your mind blown for realizing that amphibians are called that after living in both land and water.