I don't think the chemical pouncing mechanism is type-related. I find myself practically snorting my INTP's scent when I'm ovulating. It's kind of embarrassing, but I can't help myself. Eighteen years and I still want to snort him and generally act like a cat in heat.
I would have been in big trouble if I'd gotten a good whiff of him and we'd turned out to have incompatible personalities. Thankfully I'd gotten to know him a bit before I ever got close enough to smell him.
It's just gene compatibility, IMO.