A brief explanation

The Klein Sexual Orientation Grid is shown in the table below. For each person, it sets out the seven component variables of sexual orientation, listed as A through G down the left side. The three columns indicate three different points at which sexual orientation is assessed: the person's past, their present, and their ideal. The person then receives a rating from 1 to 7 for each of the 21 resulting combinations, one rating for each empty box in the chart below. The meanings of the ratings are indicated just below the grid itself.