i have a friend that is into cosplay ontop of anime's, and fps, and fighter's like street fighter who recently made a comment that i am quoting here as there's, not mine, though there are though's that might get mad at me for forwarding it. they said

teenager's, and young male's are into big chested women because they want a motherly figure as there partner, but as they get older, they start developing fatherly instinct's, and start getting interested in smaller, and smaller chest's as there fatherly instinct's kick in.