My DS is curious about the toilet and watching us too......we just got in the habit of washing his hands everytime we washed ours and now he expects to wash his hands even if he didnt touch the seat.....hearing the loo flush means wash hands to him lol. He has the toilet paper fascination too but thinks its tissue so he wipes his nose and puts it in the bin lol

As for potty for boys.......I have no advice what so ever sorry....in fact I will be coming back to read others responses DS is our first and other than pingpong ball to aim at in the grown up loo I am completely clueless!!! I bought a potty but am now wondering if those step thingys would be better!!!