hmmm..doesn't sound too pleasent. If he tries humping again, I would spray him with a water bottle in the face just a little bit, and sternly and loudly say "NO" to him. And if he tries to bite, u might wanna keep him in a room for an hour or so to cool down. I know this might be a bit cruel...but thats discipline with dogs. And if he still continues to hump, I would contact your vet or a professional dog trainer about it. They might have some important advice that could make him stop.
Good Luck with your maltese.
: i have a 10 week old toy maltese male thats humps, and if we dont let him...he gets very angry and aggressive, and starts to growl and bite. it started about 1 week ago, and tonight the "lipstick" came out! what do i do to stop him???? please help asap!!!!!