I think in general you may be right. However; I think it is all about your paradigm on life. Younger guys want to love and enjoy life. I think it is more about the fact they just left mom and dad and they want to enjoy life with people their own age, along with the social dichotomy people mom and dad's age tend to be a little stuffy and rigid in their beliefs and likes and dislikes. I don't feel it is about like and dislike as much as social acceptance. Another factor in there it the whole concept of making out with someone as old as your parents is; If they come across like your mom or dad, it can paint the false visual image stimulus that they are making out with their mom or dad. Yuck!!! Just try to imagine your parents actually having sex and I think you can get the idea when you realize how uncomfortable that thought can be.
I do believe that as we get older we are attracted to younger people but I feel this is more about eye candy and pheromones than anything. Other contributing factors are the facts that most older people have become set in their ways have become less flexible in their opinions. I.e. I love music. However; for the life of me try as I may, I really can't listen to gangster rap or rage metal where you cannot understand a single word. Yet, many of today's youth embrace it and find it to be awesome. Another factor is the feeling that we are not as old as our physical age when being around youth. Personally speaking I have a lot of youthful friends between the ages of 18 and 26 currently. A lot of them are straight some are bisexual and very few are gay.
I think there may be some truth to the chicken hawking myth. LOL. I.e. younger gay men feel like older gay men are praying on them. It is like hunting season. When turkeys are in season you see deer every where and almost no turkeys ever. When deer are in season you tend to see turkeys every where you go. LOL
In conclusion I would say likes and dislikes are phrases that could be used to describe our interactions. However; I believe that it is how we perceive our reality that decides the ultimate fate. I am more attracted to guys in my own age group intellectually and sexually. I have always looked at the person for what they bring to the table besides good looks. I cannot deny that a hot sexy young guy doesn't set my blood on fire from time to time. When I need to work at finding more that looks is when I get bored and want to move on... So, I love to date and get to know people before any sexual commitments make thing awkward.
Live long, live well, love much, and prosper... Thank you for letting me share.