Sex Sells... Unfortunately I Just Point Out Advert Copy-Cats!

I had a lovely time at the Taste festival in Edinburgh and wandered around savouring all the culinary delights (and good jazz band).  That is until I see an arty picture of a (possibly) naked woman with the line "Sex Sells..." underneath and I rush away from human contact to take a picture of it like some for of soft-core pervert.  Of course, a little explanation later that I was passing USC the day before and saw the exact same advert in their shop window partially justified my trigger-happy camera action.  The next day I passed USC again (as if I was drawn to it...!) and snapped the same image so you can judge for yourself.  Is it lazy advertising or has an agency re-used or copied other work?  Either way it's quite surprising that hip fashion shop USC and cool bar Cargo both have less racy adverts than M&S!