SOP?
The guts have bacteria, good bacteria, as long as they remain in
the guts. Cannot completely flush out. Think of Yakult bacterium
Lactobacillus casei.
On the prick, the bacteria are something else.
People only don't want to touch shit with their hands or step on
it. Argggh... very disgusting! But they don't seem to mind dipping
their prick into the shit hole.