About 7 year promise

Yesterday when i night duty,my night duty PIC suddenly told me something about the 7 year promise.He told me,7 year promise is something that will happen to every couple after they 7 year of relationship,even the couple already married this promise will also happening.This is a fate to the couple.If the couple can overcome this fate their bond will grow stronger but if they cannot overcome this fate,even they have been together for 7 year,their relationship will be demolish.Why? because there will be a third party appeared to test their relationship either on the male or the female.Let me give an example here,if a couple they had been together for 7 year usually they had already take thing as naturally like if they hangout together,male must be the person who pay the bill or if the male/female get injured or sick and need to take a rest,the male/female will just tell the male/female to rest and won't ask the reason why he/she get injured because rest is more important but they have forgotten about caring...Those were some of the situation example how the third party join in their relationship,by caring them during they sick or injured and the male/female will start compare between the third party and he/she.As conclusion,7 year is almost a decade,if 7 year of relationship can be broke so easily that mean you have wasted 7 year for nothing,couple should treasure the moment they had been together and try to be honest to each other then only the relationship will last forever...