Sometimes there's car porn from rd95
And poetry porn from lil or _refugee_
And music porn from thenewgreen and others
And science porn from OftenBen
And I drop some occasional architecture porn...
But actually... That's not fair. None of its porn. It's the real deal. It actually satisfies and means something to the sharer and the sharee.
Joking aside, While I can't say the place is porn free... I don't think I've seen anything pornographic.
I think you'll find some cool people, a great community and some ideas that make percolate until they expand your mind.