Sorry that thats just utter shite (lol!) - it's perfectly normal for poo to smell, it does not mean there is anything wrong with you!
Our bathrooms just smell neutral most of the time (unless someone has just been in there for a shit, or unless someone has been for a shower in which case it smells of wash stuff). I can't really be arsed constantly spraying and pouring chemicals everywhere all the time to make it smell of perfume. I have a reed diffuser in each one and clean them regularly but that's it.
If there is a funny smell in there all the time then it's highly likely there is a leak somewhere, even a small one can really smell over time, or something up with the drains.