It's a pretty long-standing joke that there's a flickr group for pretty much every conceivable photographic need. I've been invited to add pictures to pools ranging from hibiscus flowers to the colour orange to 'girls wearing Converse'. Some I figure "why not?", some I just ignore.
Today's invite takes the biscuit:
You've been invited to add this photo* to the group
Menstrual Cups I'd say you couldn't make this stuff up but I don't entirely believe it isn't actually a joke.
*
This is the photo in question (it's not a menstrual cup, don't worry). Not long after having had a conversation where a friend attempted to persuade us that the Mooncup is a better way, seeing the fierce debate on this sticker on the back of a toilet stall door just made me laugh.