MU (Mutual Understanding)

[Maykeee]

maybe the new label for two love birds who are both taken but sexually commited to each other

[VivaForever2005]

I've been through a series of relationships in the past weather its serious fling or something that we can call with a benefit...but Mutual Understanding or MU is a thing that I never been thru....Is there any difference there when having that understanding or its same when you are in a relationship or it is something that with commitment or strings attacthed or even the 3 letter word is involved i need help on this one please and I need an explanation.