You know, I was really wondering about that (but for the present time). If I go to Japan with the college program, I'll be staying in families' homes. I don't know if I should just politely refuse a bath (and just use the shower) even with a tampon during that time of the month. I would never offer a bath after being in it with a tampon, but then again I don't offer baths.
Being the guest and going first would be so embarrassing