Fat boy slim!!

It's been a long time since I got myself a pair of jeans.
The one that's my favourite clings to me too much for comfort. The ones fit look dirty even after a wash.
I, preset with a particular shade, searched for a month, not being in too much a hurry and not getting the shade either.
Today lady luck smiled on me. Atleast that's what I thought first, not knowing what was to come.
That shade was in all the sizes, except for my size x, which is my size since 1 year before.
So I tried size x-2, since they jump along even numbers. I had half a mind to take it, but my tummy protested too much.
Heeding it, I convinced myself with a jean of some other colour and a different brand and tried one in my size.
It fit alright but not that comfortable.
So I walked away, saying to the salesman that I'd visit again once he gets one of my size in that particular brand.
My friend asked that I try one of size x+2. I pooh-poohed him in confidence. He insisted.
Reluctantly, I yielded to him and walked to the trial room with my chosen jeans in a size too large.
Horror of horrors, it fit comfortably.
A long walk to the billing area, and a longer walk back to my friend!
I've got to exercise.
Any ideas to get the lazy bones to start working out?