<< 1. The 3-letter word that's always on everyone's mind.
2. Sleeping.
3. Eating.
Trying to combine any two or all three together can be very hazardous. >>
Not in all cases.
case 1 + case 3: Works if using whipped cream. Pizza is quite questionable for this... though if you used the right position for case 1, you should each have a free hand.
case 1 + case 2: If done one after the other, not a problem.
case 2 + case 3: Better watch out, or you too could be in a Subway commercial if these are combined. Or you could be remembered like Momma Katz... no one remembers your life's work, just that you died choking on a ham sandwich
case 1 + case 2 + case 3: not recommended.