Feel like poopooing after smelling evil stench

So I was walking down the streets of Melaka for a short getaway, while happily walking... The stench of the sewage came and it's gross and as hell. I had to cover my nose and suddenly I realized I need to use the toilet. To do my big business. Then I realized every time when there's a stench, I will feel like going to the toilet to clear my bowel. This is so weird!

I guess it's like hearing the sound of flowing water and it making you feel like urinating?

The hell.