I misread that as "fat" women, and nearly downvoated you ! Fat women are very likely to be anorgasmic as  fat (being metabollically active) tends to screw up their hormones and  put them in "estrogen overdrive", shutting down testosterone production entirely. Women with  very low levels of testosterone tend to be depressed, insomniac, balding (however counterintuitive that sounds), and incapable of reaching orgasm. FWIW, I've noticed that , the more toned are my muscles, the easier it is to reach orgasm, and the stronger are  those orgasms .