Why are my farts silent but deadly?

Question

My friend has farts, but you hear and not smell them. But for some reason when I f**t, you don't hear but u smell it and it's REALLY bad.

O_o

Answer 1

Usually symptomatic of the kinds of food you eat. SBDs are caused by meats and veggies, as well as the notorious eggs. These have a lot of methane and sulphur content. Or it could be a sign that you're irregular, or sick.

Good old fashioned loud, non-smelly farts come from lots of beans and swallowed air.