A discussion of the D&D 4th Edition dragonborn race caused an unfortunate realization: the females have breasts. Female reptilians that lay eggs. If you have a female reptilian pet, I will give you a moment to go check that. Note that the bottom of a female turtle’s shell does not have cleavage. I do not know how consistent the illustrations are: fantasy setting regularly reverse the decision on whether female dwarfs have beards, and some of the images could be female dragonborn without breasts. Once the epiphany arrives, you start seeing it everywhere. See, for example, Earth Eternal. Those are some prominent breasts on frogs and birds. If you have a female avian pet, I will give you a moment to go check that.
If you have a female mammalian pet, I will give you a moment to go check that. Note the cat’s chest: fuzzy but flat. If you have seen a litter-bearing species nursing, count. Catgirls? No. Female tauren, really? Those are not udders. And for the places that put udders on all humanoid cows: that is a bull, and there are degrees of wrong going on when he is squirting things. We will not get into female-aspected rock and fire elementals that somehow exhibit sexual dimorphism.
The Everquests, I am told, are good about this. I am even willing to give pectoral credit once a few races get it right. You also lose no points if the species in question was originally a humanoid mammal (naga) or was designed to interact with humanoid mammals (succubi). I am going to stop thinking of examples before it gets stuck in my head, but you are welcome to contribute yours. Comments are open.
For the furries in the audience, yes, I know this is old territory for you. Please do not link to those discussion threads, especially ones with illustrations, especially especially ones that get into fetishes. Discussion threads from Earth Eternal and other games are acceptable. I hit TV Tropes, which led me to the dragonborn breasts discussion thread (past 500 posts). (Official word: D&D has a hand-waving explanation about how they are not really reptiles. Neither are dragons.) For anyone reading at work, I recommend waiting until you get home to click any links.