Can it be the same keyword in the sub-domain, ie. amateurs.pornblogbytes.com?
Otherwise I've got
XXX Blog Maniac I could link to your XXX Blog,
walrus babes and
babe sex posts for your babe blog,
shemale sex blog,
blogcameltoe for your cameltoe blog,
brazilian booty blog for your brazilian blog.
On Walrus Babes I can give you a hard link on the index and add your RSS feed.
Let me know if your interested