Don't know if this has been posted yet, but I found this gem of a lovely woman in a bikini, and having her midsection massaged. At ~1:15, ~1:50, and for sure at 2:17 she giggles with laughter. All reactions are purely authentic (my favorite), and for you tummy enthusiasts out there, there are some very hot moments of tummy caressing, and oiling. I loved it!!! Here it is: 
http://www.youtube.com/watch?v=sZb8AAZne-g
http://www.youtube.com/watch?v=sZb8AAZne-g
