L.U.
A. - i could be totally wrong, but I am pretty sure our bodies have good bacteria and bad bacteria. If he does not have bad breath and you are brushing his teeth than I would not be worried about it. I also know that my dentist recommends NOT using the tongue cleaner since it gets rid of "stuff" that we need in our mouths.
I have never brushed my children's tongues and if I tried to scrape them than he would gag I am sure.
I am sure he is fine! L.