alas I thought your comment was serious. it's awesome that you have had the opportunity to find it a non-issue and unfortunate that you have decided to.

http://www.amazon.com/Unlocking-Clubhouse-Computing-Jane-Mar... is a pretty good academic references, with plenty of examples of parents who actually do do this (teach sons and not daughters), hard research, and practical solutions. luckily it actually isn't that hard to start on the path to fix for those who bother to find it an issue (CMU and MIT among them).