Here is just a sampling (Warning: These may be provocative and also may include adult language). I find it interesting how many are about girls having them. BTW, searching "wet dreams" on Youtube is a trip, there are also some videos of WDs and hypnosis vids that supposedly induce them. I hope I don't get myself in trouble there...
http://www.youtube.com/watch?v=EszOFyVLuW8
http://www.youtube.com/watch?v=C79spWeuakU
http://www.youtube.com/watch?v=TaODDENG0_o
http://www.youtube.com/watch?v=VNAMX3ltCgY
http://www.youtube.com/watch?v=3Ojg_vTZ4Kc
And this last is really descriptive of the kind of dreams I have:
http://www.youtube.com/watch?v=DkK-gYv3wIg