So there's a popular Smartphone app now called 'Vine' that allows users to upload looping short videos with sound. It's really fun and people have made some incredibly creative stuff.
It uses a tagging system similar to Instagram, and on a whim I tried 'Sneezing' and a few other keywords on my iPhone. There's actually a really good number of videos, although there were numerous that were obviously under 18.
Note that you can only search on Vine if you have the app on your phone/tablet and that not all users allow linking/embedding of their videos. (and it's not easy...you have to email the links to yourself).
I debated sharing this, but I figured others would latch on eventually. Let's not turn this into YouTube, okay? Hopefully since it's harder to comment on Vines.... anyway...
And note that when the links open, they'll probably be muted. There's a button in the upper left of the video to unmute.
Female:
https://vine.co/v/bFmEbdlJaLZ (my fav!)
Male: