Before Tinder existed, there were quick ways to find a partner, and this classic Mexican toy is an example of it. The mechanics of the atrapanovios, also known as Chinese finger trap, is simple but fatal. Ask your loved one to insert his or her index finger into the opening and stretch so that he or she instinctively wants to pull their finger out.
No matter how hard he/she tries, he/she will not be able to get out. Unless he/she knows that the cylinder must be contracted in order to remove the pressure. That may be cheating, but in war and in love anything goes.