These are so good. After you've lived in Japan for a while you go back to (pretty much any) Western country and feel like going back to the middle ages. It feels outright barbaric not to have this level of hygiene.
I guess it's like going to a place which doesn't use toilet paper?
I have Toto bidets installed at home (in the US)... was visiting Japan for a couple weeks last month and was overjoyed (not exaggerating) to see bidets in pretty much every bathroom, even in low-end bars and restaurants. I think I remember exactly one toilet I used that didn't have a bidet.
Then I come back home and go out and about and am disappointed when even nice restaurants don't have them.
I guess it's like going to a place which doesn't use toilet paper?