I personally think "worthwhile" girls are not so much attracted to money as financial stability and responsibility. However, there are times when toys are really nice to have, and can be fun in social settings -- maybe bias toward purchases which can be enjoyed with other people.

There are definitely diminishing returns -- being able to afford an occasional meal at a decent restaurant is worth a lot, but being able to buy out the bar every night is not necessarily any better.

Three classics from Quora may be relevant:

http://www.quora.com/How-does-a-penniless-entrepreneur-attra...

http://www.quora.com/How-does-a-wealthy-man-in-Silicon-Valle...

http://www.quora.com/How-does-a-successful-entrepreneur-get-...