My Boxer boy is 11 weeks old.  He sniffs at my 10 year old spayed bitches 'bits' and jumps up in a position as if to mount her.  My bitch has been spayed since she was 5.  He also does 'humping' movements!!  Is it usual for dog puppies to be sexually aware at such a young age?

Don't worry - bitch puppies do it too :)

He's just playing - it's not s@xual :)

Oh, thank you!!!  Never had this sort of reaction from such a young pup!!

Happens with human toddlers too.

Eeeeeek!!!!  REALLY?????