Hmmm

My mum told me all women are not the same except when it comes to men

Nonsense. It takes more than a big booty to maintain a relationship. The lady with a fat ass could be happily married, while the one on the right could just be a plaything to randy men looking to dip it in.
Ever watched a show called, My 600lbs life? Almost all the obese women on that show have dedicated husbands who help them with their daily needs, such as bathing, getting dressed, walking etc. To me, that's love in its genuine form.