All I have to say is thank goodness that I don't have the only humping cat out there LOL. We have two dogs 65lbs and 124lbs and a siamese f/s 7yrs this past Nov I fostered a male siamese 12wks old, he would jump up on the sofa to clean his bellylegs and his little pinky would be hanging out (I must say this is the first time I had ever seen that from a cat and I have cats all my life), he would then jump down and mount my f/s grabbing her by the back of the neck as expected she would get pissy and hiss/spit/growl and run away then acouple days of that going on he then moved onto my 65lbs dog. I had him neutered in Jan and he's still doing it, not so much to my dog as to f/s and she has gotten to the point where she cannot stand him always jumping on her, I thought it had to do with me waiting to have him neutered as with past boys I had them done at 12wks(not so easy this time to find a vet who would do early s/n). I haven't had a kitten in 16yrs wow are they crazy