I love anal, too. And I love to see girls that admit to their anal fetish so intensively like You do.
Unfortunately it's not that easy to find exactly what You are looking for but maybe you like the following blogs...
Here are some sources I have found so far (most of them are so called anal only blogs. And female ass only):
http://analonlytrainer.tumblr.com/ [anal only caps]
http://analboyfriend.tumblr.com/ [posts also some anal captions]
http://kinghut.tumblr.com/ [mainly gifs and pics but also some captions under 'my creations']
http://makesyouwannatryanal.tumblr.com/ [sexy anal gifs]
http://analsexonly.tumblr.com/ [gifs]
http://analk1ng.tumblr.com/ [mainly anal gifs]
http://miss-susan.tumblr.com/ [lesbian anal pics and gifs]
http://vaginalisdead.tumblr.com/ [gifs and pics]
nice site if you are into looking at assholes as well:
http://nice-pooper.tumblr.com/
i have more of those...
Let me use this post to promote my blog as well
(it's about many fetishes):kinkmepls.tumblr.com
And here just some pics so that this reply is not a text-only one
:
