Tumblr has spilled all over 4chan and dredges itself up whenever there's a "pick one" thread about women. The fat one is always the "high test".
Aco's sticky is high test, for example.
Overweight/obese characters and people are not "high test" as the default. In fact, anybody that goes for them is likely shooting for a market of less biologically desirable females because they cannot compete with other males for more biologically fit partners.
They're literally beta by avoiding the trouble of competition altogether.