Easy Riddle: What fastens two people yet touches only one?
The Western tradition of wedding rings dates back to Ancient Rome and Greece and gained its meaning of fidelity later on. This is why when a married person is cheating their partner, they usually take their wedding rings of.
Also, when you see a wedding ring on someone’s finger you know they are married, and you should not approach them in a romantic or sexual way. Therefore, a wedding ring bonds two people like the riddle here indicates; however, it only touches to one of them.
The answer of this riddle is a wedding ring.