You have already mentioned the reason for your obsession with mature women. Often, what we desire in childhood and our experiences leave a lasting impression on our psyche and that carries on in our youth and beyond.
When you were young, massaging your aunt’s thighs must have not been as pleasurable as now, when you think of the past and imagine what could have been. It is normal and natural, due to your growing up experience.
There are some reasons why young men prefer mature women, also called MILFs (Mother I’d like to Fuck) or Cougars. The Media has highlighted so many Celebrities who date young men and have relationships with them. One of the reasons why young men like you, dig mature women is because Mature women are confident about their sexuality. Young women compete and compare themselves with their Group. Older women have seen it all – marriage, kids, jobs etc and so are more confident.
Today, due to advancement of Science, even mature women do not look their age and look much younger. So, young boys and men no longer feel like they are dating their mothers, and are proud to show off their partners.
The most important reason is that Older women are more sexually experienced and do not beat about “their” bush. They are more than happy to teach their younger lover all about sex. They enjoy sex and so have no inhibitions about enjoying a younger man’s company. They are not shy about communicating their needs in a relationship, especially in the bedroom. They are interested in having an orgasm and feel no pressure in asking for it.
Finally, as you may have noticed, mature women do not always expect you to pay for the entertainment and the hotel bills etc. This helps the young man to perform better in bed as he does not have to stress much about what his partner is thinking. All he has to be is the Stud.