You are missing the point on that. The things you prioritize in your 30s and 40s will be totally alien to that of a person in their late teens and early 20s. People that are 18-22, so barely out of high school/college aged, are still trying to find their way in the world, discover themselves, experiment with life, etc. If you are in your 30s and 40s you are going to be prioritizing things like family, career success, enjoying personal time, etc. Women that are 18-22 are looking to have fun and excitement, a man that is 40 should be looking forward to having some personal time to himself, peace and quiet, etc. lol.
Seriously, what the hell would a 40 year old man an 18 year old woman talk about with each other? She's busy thinking about what college she might go to, maybe what sorority she will join, what party or nightlife venue she'll be going to this weekend, etc. I'll use myself as an example, and I'm 33 so a bit younger lol. I'd be busy thinking about my main job, investing/money, my side business, the gym, running errands, making dinner, sleeping/resting, etc. Totally different existences there.