This could be a very useful collection. Many a film depends on a good old-fashioned fart gag, and as far as I’m aware, there’s only one or two ‘body wind’ libraries out there currently.
Feels a bit weird to give you guidelines – bit of an invasion of privacy ‘n’ all – so use your own judgement on this occasion!
One request: This is one occasion when editing is necessary; if you’re providing a recording of several burps or farts, please edit your track down to the important bits, in an easily auditionable series. Other than that, let rip!