My male only does that to my 4 year old (they like to play rough) but it is usually all in fun! I have had him around my nieces and nephews ranging from 4 months old to 8 years old and he doesn't do it to them, only my 4 year (who also cracks up laughing everytime he does it!) So I am not sure how to break my "boys" from doing this! Right now they both go on timeout! My son Troy goes to his room for 5 minutes and Tommy goes to his "room" (my bed) for 5 minutes! After they come off of their "Timeouts" they are right back at it playing! I would think though that since your baby is doing this to you only you could give him a prompt "timeout" where he can't have contact with you for a minute or two, that would probably drive him nuts but I think he'd get the point pretty quick beings he has been doing so well with his other training! Good Luck I am sure your baby will quit this behavior before my fur-baby and "skin" baby do!