If you're looking for erotic stories, apparently Literotica.com has some good ones.

If you're looking for sex-related forums, the Tilted Forum Project is a little like Pixies, but you have to contribute regularly or you get booted apparently.
http://tfproject.org/tfp/index.php

If it's amateur pics you're looking for, try picturechat.com - you can post your pics and look at other people's pics. Also have chat.

Of course, as has already been said, no other site matches Pixies. Nor even comes close.
Hope this helps!
CasperTG

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You know, Blackadder, for me socks are like sex. Tons of it about and I never seem to get any.

My Photos:
https://imgur.com/a/80hiRdm