My almost 13 year old Truman still loves to hump a big ol teddy bear when it's available to him!
The first time I met him was at 7 weeks of age...believe or not, he humped my arm. That's how I knew he was the one! ha ha
Even after a month of not seeing him he humped me as soon as he came home with me. He used to hump his toy basket and even got "stuck" a few times in that, but there was no stopping him!
He was neutered when he was 6 months old and is the most gentle, submissive little sweetheart ever. But...look out if you are big, furry and he can wrap his paws around you!