How’d I Get So Sweaty?

How’d I get so sweaty?
I’ve not done eff-all yet,
And still my sodding t-shirt
Is all sodden with my sweat.
It’s not like I’ve been active,
Or been out for a run,
This sweat could not be caused
By anything I’ve bloody done.
But now I’ve got these patches
And they’re with me for the day.
It was, perhaps, in hindsight,
A cock-up wearing grey.