dont think this is an issue for just the Gay Niche.

I think the issue is that to many webmasters are targeting the high (in theory) traffic keywords i.e, gay, twink, bear, cubs, etc etc etc.

What we have found with our SE traffic (and we have tested this thoroghly) is that by targetting the top level keywords traffic actually FALLS dramatically.

We also noticed that by going down two or three keyword levels by this i mean...

If you have a site for Bears which, i presume you have at least one of

Your choice keywords may be..

Gay Hairy Men Bears

You should break this down a little so the four keywords above become...

Gay
Gay Hairy
Hairy Men
Men Bears

Then You Have..

Gay Hairy Men
Hairy Men Bears

And again...

Gay Hairy Men Bears

Each time ommiting the ',' between keywords in your meta tags to target the actual phrases rather than individual words.

Hope this helps some.

Regards,

Lee