I've only done it once but it's quite an experience. Once when I was desperate I bought some Tena slip Maxi Large's...now I perfectly fit the Medium ones so what happened? It was still a good experience. I felt like I was being eaten by the nappy but only because it came up right to almost the middle of my body - about an inch and a half above my belly button was where the top of the product was - It kind of made me feel more baby like - because to some degree during your babyhood you may or do end up in rather engulfing nappies. Another thing as well...at the time I did it Tena Slips were plastic-backed (they probably are not now after everything it's said they're going to go through! ) but the Large size didn't have plastic wings like it's Medium sized brother! Back when I did it Tena Slip Maxi Large had cotton-feel wings! However, in conclusion...has anyone else worn large when they're Medium-ready waisted?