Tumblr is a very different site and that, moreso than age differences, seems to be at the root of this — though of course age intersect with site experience in a non-trivial way. Ao3 requires you to police your own consumption of content. The question I usually fail to see being answered when people bitch about the content on AO3 is - so who gets to decide? A committee of my friends? Of those who have the most kudos? Of those who have no interest in fandom, but want to protect other people from dangerous content, whatever it may be?
Any porn star with natural big tits or had them enhanced. You make everyday worth getting up from bed to see the hottest chicks ever gag,deepthroat,swallow loads of jizz for our amusement, I say thank-you and please continue making these fucking awesome, outstanding,speechless movies for our entertainment. If only there is a way to meet you where I live in Pharr, Texas.