Why is travel a relationship compatibility test?

You're together 24/7 without normal structure/separation. Financial stress (expenses), logistics (planning), decision-making (where to eat, what to do), and personality differences (one wants adventure; one wants rest) all surface. Some couples thrive; others fight constantly.

What makes travel compatible for couples?

Shared travel goals (you both want relaxation or both want adventure—not opposite). Flexibility (willing to adjust plans if the other wants something). Humor (able to laugh when things go wrong). Separate time (respecting each other's need for alone time). These allow couples to travel together joyfully.

If we fight the whole trip, are we incompatible?

Not automatically. Sometimes trapped travel surfaces issues that need addressing (poor communication, unmet needs). Other times, travel stress amplifies normal stress. One trip worth of fighting doesn't end compatibility. But if every trip is a fight, that's a pattern to address.