Quoted By:
Its down to the amount of dick they take, honestly professor stein from harvard setup a 10 year study of women and the amount of sexual partners they had and the ones that had more aged more basically.
He worked out that a womans vagina can store dna from sexual partners from 7 years in the past and each time a new person has sex with them the dna builds up and starts to fight each other resulting in a faster aging process.