This doesn't involve any actual sweat, but it's a whole month of Callum depriving himself of things he really loves. That's actually quite a long time in this day and age. Callum is not shy at expressing his opinions. So, on Monday 2nd July, he has pledged not to utter a single word all day. I'm sure many of us will have great fun trying to provoke him into doing so - and we should be willing to put our hands in our pockets if we do. Then, for the whole month of July, Callum will do no social networking at all. No Facebook, no Twitter. And, no Takeaways, either. That's serious. I'm still not sure how I'm going to cope with the separation anxiety!
Finally, on my birthday, the last day of July, his unruly hedge of a beard comes off. I have been assured that the family of sparrows nesting in have been found alternative accommodation.
This is a pretty impressive set of sacrifices for one guy to make.
The arguments to help him towards his £500 target are compelling - and it's payday tomorrow. Go on, it's a good cause. You know you want to. Donate here.