Sloan says this creates too much pressure in a partnership.Explaining, she says: "These percentage are subjective and striving for 90% perfection still puts pressure on the relationship.

The key to a healthy relationship is to raise your standards and lower your expectations.

Lowering your expectations for 20% of the relationship which will create enough flexibility to allow a relationship to continue and grow".

She continued, "Variety is one of the Six Human Needs.

By effectively not getting your own way 20% of the time you potentially open yourself up to new experiences and might perhaps find something new you love."So, why 80/20 not 90/10, hey?

The 80/20 rule is about thinking of your relationship in a particular way and managing expectations around it.

It's about realising you need to be in a relationship that most of time is pretty damn great (80%) but 20% of the time, it may just feel good.

You may occasionally be irritated, you may have the odd tiff but you can let this slide because for the most part your relationship is solid. We spoke to life-coach and celebrity relationship expert, Sloan Sheridan Williams, who agreed this was a great approach to relationships.

She said: "Anything that encourages balance in a relationship is always a positive step forward.

Pressure will deflate most relationships and this 80/20 rule is the perfect way to let go of pre-defined perceptions that can hinder two people happily moving forward."You know your own relationship better than anyone else, so therefore you'll know if it does make you really, really happy 80% of the time.