The bigger picture why this happenes more now is less pressure, more freedom, fewer consequences. So smaller issues result in divorce etc. instead of trying to work around it, accepting it etc. Not saying people should not change etc., but they happen a lot because it is convenient to do it.

Don’t define how strong your relationship is based on the good times you had. Base it on what obstacles you managed to overcome.

I doubt you can generalize this. There are men and women that like sausage lips, for example.