In Leviticus 15:20, it says that anything a menstruating woman sits on is unclean. Then, in verse 23, it says that if a man sits on something a menstruating woman has sat on, then he is unclean. I have been to Israel twice, and I rode on public transportation both times, and I do not recall this ever having been an issue. Nor am I aware of it being an issue when flying on El Al, the national airline. Am I missing something, or is there a reason why this is no longer an issue, or maybe there is no reason it just isn't an issue anymore (in which case I will just drop the question)?