Potty training?

I have a two year old ds, he will be three in August. He knows when he has to pee and poop but will not go on the potty!! I have bought one that goes on our toilet and two of them that are his size.
What he will do is every time he has to pee he takes off his diaper and pees in our stand up shower!! Why in the world does he do this? And how can I get him onto his potty?

I'm due in July with number two and would love to have ds #1 potty trained during the day at least!

Thanks ladies!

My 16 month old does that too, takes his nappy off and runs to the shower to pee in there.

Just keep telling him the potty is where he goes pee.. and try to catch him before he goes into the shower to pee so he can maybe successfully go in his potty.. My daughter always tells me she has to pee, when she's peeing.. lol

See when he tells me, he will pee on the potty. But over 50% of the time he doesn't say anything and is just gone! Then he comes out of the bathroom naked saying "mommy I peed I peed!!!" Lol

Ya can't get mad at that! I was a little flustered when he took a nice grown man dump in my shower  

put his potty in the shower?

That might actually be a good idea!