Pants for men that disguise the problems of flatulence have been designed in Leicester.
http://news.bbc.co.uk/2/hi/uk_news/england/7367572.stm
Apparently research has shown men want to disguise flatulence and have their ahem, package enhanced.. Phew WEEE..
I expect they'll be doing a women's version soon, but without the 'package' enhancement.