I did an MST on a weepy-Wilson one, although I couldn't tell exactly why Wilson was crying: http://deelaundry.livejournal.com/68338.html

I seem to have made Wilson cry for a number of reasons. (Read all warnings before reading the fics)
Because he's a wallowing angst hound: Forever (http://deelaundry.livejournal.com/21932.html)
Fear of his pregnancy ending (genderswap): The One Where It All Ends (http://deelaundry.livejournal.com/95652.html)
Miscarriage (mpreg): Family Way (http://deelaundry.livejournal.com/37616.html)
Because he's gone nuts: Nothing on the Radio (http://deelaundry.livejournal.com/136484.html)
Because House called him fat: The Drop of Water (http://deelaundry.livejournal.com/33857.html)
Because House isn't dead: Senseless (http://deelaundry.livejournal.com/54580.html)
Because House leaves him: My Fathers' Son (http://deelaundry.livejournal.com/7091.html)
When he gets caned: Pillory (http://deelaundry.livejournal.com/18844.html)

House wins the battle over tears in Resolution (http://deelaundry.livejournal.com/11761.html)
Wilson says that House cried in After the Fourth Wedding (http://deelaundry.livejournal.com/34270.html)