I think it depends on the person or the couple involved...

I mean for me, my mahal finds it really really hard to say sorry even when we both know she was in the wrong, she will realy try put all the blame on me first before even daring to say sorry.

I keep telling her it's gonna be a problem if it continues, because of her pride, problems last days instead of minutes or hours. But she eventually says sorry anyway.

On my part, I have a habit of saying the F word a lot, which she hasn't got used to, so she automatically assumes that it is her a am aiming the F word at. Now that's when I find it hard to say sorry, because for me, that's a habit I have, no harm intended, but it's just something I got used to.

But in our relationship, it is far more easier for me to swallow my pride and say sorry, when I realise I am wrong, I will admit to it. The only problem comes when I say the F word and she think it's aimed at her, especially when I say "wtf are you on about"... doesn't sound good does it? But something I always say a lot, it's become my expression so to speak and because of that, I find it hard to say sorry...