This one was slightly delayed because I’ve spent most of the last few days in bed feeling sorry for myself. Better late than never, though.

It came from nowhere and spread like a virus. Suddenly everybody we knew was on it – telling us what they’d been up to, uploading photos, sending flirtatious messages and logging on as if the site were crack and they were addicts.

In no time at all it had millions of users of all ages, and it was regularly name-checked in scandalous newspaper articles. People were using it to arrange affairs, or to waste time at work, or to post things they’d later regret.

And then we all dumped Friends Reunited for Facebook.