"No, it's not," he replied. "I've just put some Fanta in it."

I spat my cheeky Nando's everywhere, and asked him what the fuck he was playing at.

"Everyone does it," he replied.

I went back to the office, and attempted to verify his claim. Two people on my desk said they do this and that it was a "thing". Three people said they didn't. What interested me was the fact that the two people who did it were both in their early twenties.

I remember my early twenties. I did a lot of crazy stuff. But this was beyond the pale. Had I stumbled across a new and disturbing youth trend?

There was only one place to take this.