HELP! He Won't Potty Train

This is my kid.   ------------------------------------------>

He's awesome.  He's almost three and he rides a tricycle, can run just as fast as his (almost) 5 year old brother, digs for worms like nobody's business and eats better than my older son ever did.

Seriously, he's great!

But he won't potty train.

We've been trying for months.

Here's the thing: he will go pee...if I take him and make him. But he won't do it in public, he won't do it in unfamiliar toilets (even standing up), and he won't do it if anyone is watching.

But he will never poop on the potty.

He will poop in a pull-up, he will poop in his underwear, he will take off his pants/pull-up/underwear and poop on his brother's bedroom floor. But he will not go on the potty or toilet.

I feel like we've tried it all.

We've been ultra encouraging, done rewards (stickers), offered treats (he loved that but it was a bit counterproductive in-that he only would go to the bathroom for candy), sang songs and did potty dances. We schedule potty time and bought cool Angry Birds underwear. We got him his own little potty (that he loves!), taught him to pee standing, never scolded when he wet or soiled his underwear. Despite the desperation in what I'm writing today, we DO NOT pressure him- ever!

And yet- nothing.

And I know, kids learn in their own time. I've been down this road with my first son. The moment my older son was ready, he potty trained.

But in this case, my almost three year old is ready. He meets every single criteria you can find for potty training readiness.

Even more- I am ready.  I need him to go to the bathroom. I need to be done with diapers and wipes and all that comes along with it... yes, it's selfish but it's true. I have spent months working patiently with him, but I am nearing the end of my sweet mommy voice telling him I'm totally not upset that I'm cleaning poop off new underwear or the carpet for the millionth time. Totally not upset!

But not only that, he is missing out on things because he's not potty trained.
He can't go to the amazing preschool his brother went to until he is trained. He can't go to half-day day camp (which he is so desperate to attend with his brother) because he's not potty trained. And I've seen the embarrassed look on his face when he's playing with his friends and realizes that he's forgotten to go to the bathroom and ended up needing to sneak away for me to change him.

So what am I missing?
Is there a secret to potty training I have yet to uncover?
A way to motivate my sweet little one to pee and poop on that darn toilet?
A magic key to unlocking the I'm not going to go in my pants gene?

Help! He just won't potty train!

The Potty Training Diaries- Day 4

Well, I think the diaries may stop today.
Not because Z is perfectly potty trained. He's not. But the accidents are few and far between (although I am losing a bit of patience when he obviously has to tinkle and refuses because it wasn't "his idea" and ends up going on my floor. URG!). I'm really proud of my little guy. He's a tough nut to crack but if you can approach him from the right angle he catches on really quickly.
He seems to have grasped the concept that pull-ups are the same as underwear and we have worn them outside of the house with no "accidents".  My reminders nagging to listen to his body seem to work pretty well, as the only time he really has trouble remembering to go potty is when I am busy with Will (ahem, I wonder why?).

The only issue left?
My bathrooms are WRECKED. Seriously, FOUR days of potty training and two of my three bathrooms look like a tornado went through them. Stained toilet bowls, wet floors, pieces of toilet paper strewn about, towels askew. Oy. Is this what it's like to have boys? Because my housekeeping skills cannot keep up!