The connection between words of "sax" and "sex"

It always did sound similar and, as it turns out, the word "saxophone" is etymologically related to the word "sex" - Olivia M. Swarthout points on her Twitter. It all began with proto-Indo-European word "sek" which means "to cut, divide".

in case you were wondering whether the word "saxophone" is etymologically related to the word "sex"... it is! pic.twitter.com/PvR2RAt7D4

— olivia m. swarthout (@olivia__ms) February 10, 2023