a) Nothing pathetic about self-pleasure.
b) Nothing embarrassing about self-pleasure. It's pretty likely your landlord does that too. Most people do.
You should maybe be embarrassed about your levels of cleanliness (it's not overly hygienic to leave used condoms lying around on the kitchen sink), but there's nothing else you need to be embarrassed about.
LOL.
Not kitchen, it's toilet.
If it were kitchen I would have a hard time explaining myself on why a condom ended up in the kitchen!!