Biting out of excitment

[Bookworm]

I would talk to the parents about his recent behaviour, and say that he seems to think that this physical type of play is acceptable, and it isn't here at daycare because of this (biting) very reason. I would also, maybe, gently suggest that they discontinue the really physical type of play with dad, because kids don't know that there is a time and place for it kwim?
I have two brothers that are biters, and they bite out of frustration and excitement. I have been really stressing "hands off" play with them because I find if they get physical with anyone in any way, it leads to biting almost always. I have also told the parents that I do not allow any physical type of play because of this (in the attempt to get them to stop allowing it at home).
I also, have told my husband to stop physical play with my own son (he like to lie on the floor and let our kids climb over him) as my son has started to do it with the younger kids in the daycare, and I have been teaching my son that it is not an acceptable way to play.
I guess it may seem a little drastic, but I find it has been working with the kids here.