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Seems to be the same guy (but in a different video) :

http://www.xvideos.com/video3254452/group_of_trannies_like_to_rule_over_guys

Ok, he may not be erect, but the difference in size is just...

Interesting video :

http://www.tube8.com/shemale/blowjob/straight-guy-gets-a-taste-of-tranny-cock/2771151/

You can see the guy's cock at the end and he is dwarfed (and I do mean dwarfed) by...

This video includes some small penis humiliation (well, the guy is not exactly small but she does outsize him) :

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