Gay men are what are know as 'DINKS' in the community.
Double Income No Kids.
Making them some of the most affluent spenders of their $$$ online
No wife to spend it for them, no kids to support, excellent marketing opportunities for webmasters, you just have to find out what they are willing to buy which, isnt always porn related ;)
For example, we make a shitload each month from
http://www.gayadultshopping.com 
Sextoys and the likes are VERY popular in the gay market.
Regards,
Lee