Here we go. I'm preparing for a really obvious answer to be revealed.
You are strolling around town with baby in pram/pushchair. You do not have friends or DP/DH with you. You need a pee. You cannot wait until you get home. You venture into the loos kindly provided by debenhams/M&S?wherever....
what do you do with the baby?
Because that buggy won't fit in a cubicle now will it?!
leave baby outside cubicle? leave buggy but carry baby in and do funky dance trying to hold baby and lower/raise own pants etc? use buggy as modesty screen?!