Blindfolds add an extra dimension to the game with your partner. You can choose your blindfold in the character editor, which you can put on and take off at your discretion. 

Your partner can also put a blindfold on at your discretion.

 If the blindfold is put on, the following modes are automatically enabled (and cannot be turned off until the blindfold is removed): 

• The character's vision is practically turned off. 
• All pose suggestions from your partner are automatically accepted. 
• All suggestions to take off/put on elements of your clothing from your partner are automatically accepted

If your partner puts a blindfold on you, you cannot take it off until your partner suggests it themselves. Or until the partnership is terminated.