Attractive Nuisances

You're at the gym. Running on the treadmill in front of you is a smoking hot, textbook specimen of physical perfection, who is loudly singing along to
"Call Me Maybe" blasting in their earbuds (loud enough that you can hear the song even without the simultaneous out-of-tune cover version). That's one kind of attractive nuisance.
Another kind has to do with tort law.
If a homeowner has something on their property that might attract children and might also be dangerous (a swimming pool is the most common example), that thing is known as an "attractive nuisance." The homeowner has certain responsibilities to keep the attractive nuisance protected from trespassing kids. If someone sneaks onto the property and gets hurt, the homeowner could be liable if they did not do enough to block entry to the dangerous situation.
Basically, if you think it's a good idea to leave a cupcake on a loaded bear trap, you might want to call your lawyer first.