What causes a disagreement between a couple even after having a smooth and happy relationship for 2 years?

[Ariya_Dv]

Updates

+1 y

Is it because of any external affair which brings disagreement in relationships

[Fireguy17]

the most common cause is over money.
there can be other things, he doesn't want to work, drinks too much, expects you to do everything around the house, just sits there and watches tv, or plays video games 20 hours a time, just sees you as a sex slave.
stuff like that.

[AviatorTom]

In every relationship, there are disagreements, and some of these lead to fights. That's why relationships are hard. It's not so important that the couple had a disagreement or fight, it's what they do after that to maintain a good relationship.

[Emiliamazing]

Changes in viewpoints on expectations of each other.
Expecting the relationship to follow a pattern.
Financial stress.
External pressures from family and friends (and not discussing them with each other).
These are just a few generalizations that come to mind

[TacosRAwesome]

In my case it's my insecurities and his need to trigger them.

[Ariya_Dv]

But these insecurity comes in us when we can understand some is not right

[ChrisMaster69]

Literally anything.

it could be not putting dishes away, toilet seat, a shirt not being ironed

personally it’s those little ‘tiffs’ and minor arguments that stop the big ones.

it could just be both letting off a bit of steam.

[LazerBean]

If you are referring to a serious disagreement, then usually the answer is because the couple didn't know eachother well enough before getting into the relationship.

[PsychedelicZebra]

After 2 years, you're comfortable enough (the fear of losing someone has worn off) to talk about the shit that bothers you.

[Blackcupcake]

life, misunderstandings, miscommunication, differences

[jahaims]

Could literally be millions of reasons. The question needs context.

[SnakeBoop]

anything XD

[Ariya_Dv]

Any specific reason you wanna suggest which might start causing disagreements?

[EffaMan]

2 years is very long. boring :)

[Selene1994]

Sex to little or to much, not communicating.