Everyone likes the smell of their own brand.
You've probably heard that one before, when you were ripping a real stinker in the car and rolling the windows up because you're a sadist.
But why do you like torturing innocent bystanders of your disgusting gas? Honestly, being subjected to your farts should be considered torture. Liking your farts is akin to waterboarding. You're a war criminal. You and your farts should sit before an international tribunal.
Anyway, this video explains why you're such a sicko. ASAP Science continues to do great work in under five minutes.