Sometimes...a picture can say things you could never fully express in words. Things that you need to either be able to administer or put yourself in the position to be administered to.
Sometimes...we just have basic carnal needs that we need to act out. To be able to let loose with what we feel inside.
Sometimes...we need to show our authority, or be reminded of our place within the relationship.
Sometimes...we need to show our devotion...our commitment...our gratitude for all we have.
And sometimes...at the end of the day we need to know we are needed, wanted, appreciated, valued, and mean the world to someone else.
Sometimes...you can say so much more with a picture. You can express moods...set locations and scenes...show a dynamic...you can sometimes use one picture to get across what one thousand words might not begin to say.