Three wee mice, all male, were crouched under the floorboards of a pub, getting mightily drunk on the splashings of booze dripping through the cracks, and boasting of their prowess in the way you'ld expect, since it's required for the joke.

Mouse 1.   "See me? See when Ah get hame? There's aye this wee lump o'cheese left out fur me, stack oan a wee metal spike oan a wee bitty wid; whenever Ah hanches at the cheese this metal bar comes doun awfy fast, it's a rerr terr tae catch it an hae a quick wurrk-oot, keeps the muscles souple, ken-whit-Ah-mean?"
(Mouse imitates some gym-work)

Mouse 2.   "That's naethin! See ME? I used tae be right intae the cheese masel', but nou Ah'm aa aboot this grey powder they lea' oot, wee daud ae that oan the back o' yer paw an' sniff it up yer neb, Ya Dancer! Sax oors oan yer back, paws-up, nae danger."
(Mouse indicates extreme relaxation)

Both these Mice look expectantly at their companion. Mouse three rises to go, and...

Mouse 3.   "Ah'm awa' hame tae ride the cat."