Triple Big X does contribute to the common defination of dating or flings. Which is why some or well most people do it. Testing the water is surely what some would like to do knowing in the first place would trigger their inner emotions or feelings.
Compromise come in the later stage where one decide to test the water or have already done it. What else can compromise be done on?
Faithful comes in varies way. What are your to decide might be different from others. Likewise testing the water means walking on thin ice.