I don't think anyone who's left primary school should use the word "tummy" it's very babyish reminds me of those strange fully fledged adults who still call their parents mummy and daddy.
We shouldn't be embarrassed about farting around our other half, mine has asked me to kindy refrain from doing so in his precious car, I don't know why, it's as good a place as any
We were created to expel air or silently suffer
looking at all that inner tubing (intestines) it has to come out somewhere otherwise heaven forbid surely we would combust
I do confess to not doing it around my children or heaven forbid grandchildren, although they do it around me accompanied by giggling description of the act. Still at the lavatory stage 
What made you fall in love with comedy?
Threatened with legal action (follow on from potential scam thread)
"Old fashioned" expressions that young people have never heard.
#sarcasm

