<human>: Condense the text into a few key points

My male, neutered cat will often lay down on my chest while I am in bed and beg me to pet him. He then gets in this almost trance like state of constant purring and head nudging. After a while he will get up, straddle my arm, bite down on a piece of skin on my hand and then lower his body onto my forearm. He then stays in this position for up to five minutes before he walks away looking frustrated.

I used to think he was just mad that my hand wasn't petting him enough so he would punish it by biting and sitting on it. But recently I found a stray female kitten. A few weeks after taking her in she started to go into heat. And whenever she got into "I'm a little slut, put your thorny cock inside me" position, my male cat would do the same straddle, bite, squat thing that he does to my arm. 

Have any of you run into this with your male cats? Is he actually trying to knock up my forearm? I must say it is a little disturbing to think that my cat has some sort of human arm fetish, but hey it is the 21st century and all.
<bot>: I think my cat has got it bad for my forearm. He acts like he is trying to fuck it all the time.