I'll post stuff when I feel confident about my safety. Doxxers are apparently really good at doing just that from seeing the tiniest little detail from a pic or video. There just wouldn't be anything I'd get in return for risking my life. Sorry. Never say never, I'd like to when I figure things out. I've sent pics in private to a couple of people on ZV before that have earned my trust... but that's as far as I've gone. I don't do it easily.
I'm no expert (I haven't seen the dicks of 150 male dogs in person), but I really don't think weight and size is a good indicator of how big a dog's dick is going to be. My boy's knot is probably just a tiny bit smaller than a softball, and I've seen knots (in pics) from a few different breeds that look bigger than his. Don't know what to tell ya... other than that's his size, and it's basically vagina candy.

He weighs around 220lbs, so he's not even the biggest of his breed.