Being able to see through walls was something that only certain superheroes have ever been able to do, and it's something that many people have dreamt about, mostly for perverted reasons. Well, mortal crime fighters and perverts, I have good news for you. The technology to allow you to see through walls is here.
The Lexid cam takes its cue from how lobsters see by "beaming X-rays, then focusing on the reflection (rather than refraction) of objects." This allows it to see through materials such as wood, concrete, steel, and, presumably, bathroom walls. It'll go on sale to people at places like the Department of Homeland Security first, then presumably to perverts eventually.