For me, Duncan Black [twitter] is a bottom. But, did you know that he had three scenes as a top?
The first one happened in 2009 during his twink stage. Using the name Ryan Cyprus for Twinkscape, he fucked Jesse Swift.
He stopped gay porn and came back this 2012 using the name Duncan Black. In his comeback, his second scene [gallery] was a top was released by Bait Buddies where he fucked Joey Love.
His third and the latest as top was released by Dominic Ford this month, Dec 2012, where he had a flip fuck with Sean Duran.