An interesting study by Bram P. Buunk and his colleagues in the journal "Evolution and Human Behavior" titled "Age preferences for mates as related to gender, own age, and involvement level" found that women preferred partners of their own age regardless of the level of relationship involvement. Men, on the other hand, preferred younger women for sexual relationships but preferred women closer to their age (but younger) for long-term relationshps.
This may help to answer your question as to why older men prefer Barbies.
Yes, that's make sence. It's almost like a business deal. Man wants Barbie with the younger body and she wants his big $ in exchange until she clean his bank account to 0. But poor Barbie, what is going to happen when he dies and leave her with 0 ?
Just like Anna Nicole Smith who was left with no $ except depression which leads to death. What a life !!!!!!!!!!!!!!!!!