That's really interesting that certain smells make you aggressive. Have you got any idea how that works? My son sometimes gets furious for no apparent reason and I have wondered a few times if it was triggered by pongs. I used to send him to a trendy hippy nursery (the onyl place where they were cool abotu all his food allergies adn guaranteed he would never be given gluten or other things that make him illl) and sometimes they burnt incense, which made him go utterly loopy and attack the other kids. In the end I asked them to stop with the smells,and he was fine.