One might wonder how the house of muhammad was like. We might not know so much about the interior design or furniture, but we do know some of the prophet’s behavior inside his house.
Sperm on the wall
(1) Narrated Maimuna: The Prophet took the bath of Janaba. (sexual relation or wet dream). He first cleaned his private parts with his hand, and then rubbed it(that hand) on the wall (earth) and washed it. Then he performed ablution like that for the prayer, and after the bath he washed his feet. (Bukhari Book #5, Hadith #260)
Muhammad took a bath of janaba because he was ritually unclean. But the most interesting part is about how he took care of his hygiene afterwards. One must wonder how the walls of muhammad’s house looked like. And how it smelled after a while.
Urine under the bed
We also know that muhammad had a wooden vessel filled with his own urine under his bed. One can only hope he emptied it once in a while.