In our house, when someone breaks wind, we don't comment and if the offending party feels like it, they ask to be excused. Today Sophia passed gas, said 'Scuse me,' and continued playing.
Today as I was getting Edwin dressed for bed, he too passed gas. He can't say excuse me, so instead gave me a huge smile and then giggled while kicking in delight. Heaven help us, there's now a little boy in the house.