They are both adorable..my good friend has always had poms, she just said the other day after seeing my 2 babies, that if she ever changes from poms, she's going to yorkies...LOL as far as the humping, he's trying to show his dominance, heck, this little guy I got will be 12 weeks tomorrow, and tiny as can be, but today, he was trying to hump the shih tzu and she's going on 10 years...I usually just do whatever I can to distract him..