We talk to our poos....:rofl:
Seriously, we had a very brief period of scared to poo in the toilet, so we began to talk to the poos and thank them for coming out and talk about the adventure the poo would be having once he is flushed away...
OMG sounds batty writing it, but it worked really well for us. We did the same thing to encourage her hand washing - thank you bubbles for washing away the germs!!
Lots of praise, waving goodbyes to the poos and saying thanks for visiting, letting DD push the flush herself all helped.
:)