How to stop thinking like 'first is special' in relationships.

So something we have been thinking about recently is the 'first is special' toxic idea of like it's better if some{one/many} does a particular thing with some{one/many} first before any others or just before some{one/many} else even if they aren't the first and how to stop thinking this way.

Do y'all have any ideas/suggestions on how to do this or work on it (slowly)?