I'm glad it's not just me who went through this! My daughter has since taken to the potty and stopped with this, but we had a number of those too and actually she would stick her hand in it every single time to let me know she had gone (as if I couldn't smell it across the room.) Anyway, I figured it out - she wanted to see it and touch it because it's so personal and important to her and it made her proud that she could "make poop." I've heard it's a very Freudian thing or something. So anyway we worked the big girl angle with her and that works for her. Big girls don't touch their poop - big girls use the potty and wear big girl panties. Once she got a taste of big girl panties, that was it - she loved them and there was no going back. She took to the potty within a week's time. Pooping on it was harder, so we'd sit and read and I'd ham it up and congratulate her and then she'd get rewards like stickers or a treat. Mostly I'd give her treats for what she didn't do - if you do not touch your poop today, you can have a sucker, etc. I hated resorting to candy but that is what worked for her. Mostly do not make a big deal of it - that makes it worse. Encourage the potty and good behavior. Oh, and before she took to the potty, I would tell her I would show it to her when I changed her and she loved that. She had to see it. I know - gross. Also, if she loves cleaning, why not encourage that at other times? I am a Shaklee rep and we use only non-toxic products so its safer for her anyway, but I can actually give her a Basic H wipe and let her go to town on the fridge, oven, her toys, whatever. It's totally safe and she loves it.
Good luck!
K.