Whereabouts on your person do you like to get messy the most ? Do you like it in your face and all over your head? Maybe you like it over your chest? Are you one who loves to get your feet and legs messy? Perhaps you like the kink of getting your arse or your private parts in a mess? Or maybe you just like it all over you?
Actually, this was pretty thought provoking for me since it's been so very long since I've gotten messy. I never really thought about specific areas, and WAM is very much more sensual for me than just visual. I know what I like it watching it, but never thought about what I like about it for myself. I'm going to go with the full body experience for my answer though.
Legs and trunk. Not keen on head wam, and like to keep my hands clean in gloves. Basically think of the areas that get messy if you pour mess into a pair of overalls.