That clay figure was likely to show a mother goddess, so over exaggeration of a well fed pregnant body with exaggerated breasts to emphasise an ability to feed newborns.  It won't have been sexualised in any regard nor will it have been considered desirable as a normal state to be in. Basically, people are redescriptive retards who look for any excuse to promote 'big tiddy gf' and 'thicc gurlz'