Place under running warm to hot water to create a luxorious silky smooth dream.
Recommended use is 1/2 bar up to one full bar.  It depends on the experience you wish to create and the type of water you have.  I have hard water which means for me that I use more of the bar.  My sister has soft water and uses less.  It's your experience, so it's your choice.  I like to add candles and music to top it off.