Here are some of the good sexfight sites - places with creative captions and good thoughts, well expressed.

Sexualrival.tumblr.com
carinassf2.tumblr.com
eroticdoom.tumblr.com
fighttothesex.tumblr.com
extremerivalry.tumblr.com
clairerogue.tumblr.com
xpresso3000.tumblr.com

I know I must be missing some. What places should be included?