The whole problem with that product is the need to make the underwear airtight. Ewies. I did read once upon a time about tablets you can take (which I believe are also charcoal) to nullify smells. Any health risk?

[snorgs] Thanks - it's a fantastic site with a wealth of snigger potential. 'Wear them for the one you love' springs to mind as a suitable phrase for examination, given that possibly the most irritating and in-yer-face flatulence occurs beneath the duvet ...

Here's the page for aforementioned internal deodorant, although it's very coy about the fart business.

[Chalky] "In-yer-face" and "beneath the duvet" was probably more information than I strictly needed.

[rab] sorry ... didn't realise you were looking in :-)