Feeding Phenomenon

Stone is nearly five months and every other day or so, when I start feeling guilty that he sits in his bouncy all day, I'll put him in his highchair and feed him some rice cereal. Consistency is the key I know but "they" say I have until six months so I'm sure we'll get in some sort of routine at that point. Anyway, just wanted to see if any of you out there could feed someone without opening your mouth too. I have tried it and I can't do it. Sort of like rubbing your tummy and patting your head...