TMI thread. Discussion of sensitive ADULT issues/triggers. Enter with awareness!

[LittleCharmer]

The title of this thread just keeps getting more intriguing..!

I'm going to steer this thread in a slightly more amusing direction, since there is really nowhere else this topic fits:
Why do some people not understand the concept of air freshener after using the bathroom for certain unsavoury purposes? Especially when they are a guest in somebody else's house and the option is very clearly available to them. Is it simply ignorance of the olfactory assault they are imposing upon others, or do they genuinely not have any sense of propriety or embarrassment?