Coffin.

first fight box? Write love letters, a put bottle of wine set in small wooden box at wedding and nail promptly.

Couples who have first fight, open box, share 1 glass of wine read loving sentiments. The sad reality is time passes, love letters exist (can be destroyed), memory fades, and foundation cracks.

Everything becomes a blur suggestion become alcoholics. Week after honeymoon, set permanent amnesia cuz neither will remember anything after