Bro, that is perhaps the sexiest thing I've seen in a long time. Talk about doubling your pleasure!! I can't even begin to imagine the waves of pleasure you're experiencing while you're doing that.
First off, your own cock is slamming your own prostate, producing waves of enjoyment that travel right back to your cock, causing it to swell even more and press against your prostate to increase the ripples of joy. It's like an unending power source of sexual fusion.
For an older dude, you have an amazing body, handsome face and you certainly got some great equipment.
I know you're straight, but would ever consider letting another guy fuck you?