Does anyone know the mekor of the minhag I notice of many frum men with long-sleeve white shirts and the buttons on the sleeves are left open? Please cite your Ha’aros.
In my case, I’m afraid it’s far more a case of laziness than of a minhag.
I prefer short sleeves and so, when I have a long sleeve shirt, I’ll often roll it up my sleeve. Sometimes, it comes back down and I will either have not noticed it yet or have been too lazy to roll it back up.
In the 1800s buttons were very expensive and it would be considered showing off to have buttons on sleeves, where they are not needed. Even those who could afford it didnt flaunt this, shelo l’haashiro es boniv. The rabbonim of the shtetls wrote a joint letter to the mechaber asking him to add this to shulcha aruch, which he did in YD siman 404. But very good question.
To some it may make it a “place not usually covered”. Some have that “inyan” to expressly expose that part, so as not to necessitate washing one’s hand when touching that body part. – that’s what I heard.
it’s because goyim close the buttons so it’s probably chukos hagoy. furtheremore in the early 1500’s there was a cult of apikursim known as the sogrimchultzosim who’s symbol was a closed sleeve button. all the gedolim were mesaken to open all your shirt buttons. then someone was meorrer that there is a lack of tznius to open all your shirt buttons so only sleeve buttons were left open.
in all seriousnes people just want to give posters here something to talk about.