Trust us, these locales are not the place to get randy.
Your Flatmate's Bedroom:
Aside from the fact that it's just plain wrong and disrespectful, you do not want this kinky karma coming right back at you (read: you sleeping in her wet spot next time).
The porcelain throne may be a convenient height for seated booty, but we have one word for you: bacteria. The average toilet has 49 germs per square inch.
Your Walk-In Cupboard:
Oh yes, this spot will make you moan - but it'll be in pain! The average wardrobe railing is not designed to hold 140kgs - the average weight of two people.
It might seem like your own private love cocoon, but don't forget you're parked in a public place - and cars have lots of windows.
Hmmm... all that sun, sand and semi-nakedness... not to mention parents with young children who are also looking for a quiet spot the behind the dunes.