Firstly, you probably won't get an honest answer and, secondly, if you do, knowing your mate's belt-notch numbers may come back to haunt you. So to my massageplanet friends (at least I must have one), always LIE.
http://www.torontosun.com/life/sexfiles/2010/04/14/13580536-qmi.html
http://www.torontosun.com/life/sexfiles/2010/04/14/13580536-qmi.html