Sugar daddy/sugar baby; A relationship where typically a younger woman provides 'companionship' to a 'generous' older man. A way of saying a regular mistress, 'kept woman', etc. Can involve roll playing or whatever is negotiated. An old refined form of prostitution with a newer name by adding the 'sugar baby'. (The term 'sugar daddy' has been used for years. 'Sugar baby' is a newer phrase for the woman's part.)
"Man, you should see all the ads for SD/SB arangements in the classifieds. Wish that I could afford one."