Generally you are nude, but you can wear underwear, especially for women who are menstruating.
Generally you are nude, but you can wear underwear, especially for women who are menstruating.
During certain types of massage you can such as Thai massage, Shiatsu or chair massage.
Sure. There is no problem leaving your underwear during a massage.
DICK?
Yes, you are allowed to wear whatever makes you the most comfortable. There are massage styles where the recipient remains fully clothed the entire time.
No, you do not have to be naked. You can wear underwear, but women do need to be topless.
Asian women are allowed to wear underwear in Kumamoto. Many of the Asian women do not own underwear.
Cows wear underwear because there were minority issues during the great depression.
It depends who's massaging you - I imagine it'd be easier without clothes, but I doubt anybody's going to force you to strip...
The answer depends on what you consider to be underwear and in which country. In tropical countries people are more likely to wear light underwear whereas during the winter people in cold countries are more likely to wear heavier underwear.
When you get a massage of any kind, it is not necessary to be disrobed of all your clothing. Not even a French massage. Some modalities are performed more easily if the cloths are removed, but this is not a requirement and no professional massage therapist will ever force their client to do something they are not comfortable doing, even removing clothing.