The Citrus Scale is a scale used to measure the intensity of sexual activity in a fanfic. It ranges from the very mild to the insanely wild. The scale is as follows:
| 1. | Citrus | |
|---|---|---|
 | Citrus is used to describe the most mild interactions on the scale, such as a romantic hug or a kiss on the cheek. | |
| 2. | Orange | |
 | Orange is used for kissing, hugs, and some more touching beyond that that begins to have a hint of sexuality. | |
| 3. | Lime | |
 | Lime goes further into the sexual, with heavy making out and possibly some light groping. Some might not have these, but rather qualify as a lime for hinting at lemon-scale action. | |
| 4. | Lemon | |
 | Lemons have actual sex. | |
| 5. | Grapefruit | |
 | Occasionally, a fifth fruit (well, fourth, since citrus itself isn't actually a single fruit) is added. It is generally said to be the X-rated or truly bizarre lemons, but it is not widely used. At any rate, it might be discouraged from inclusion in the Citrus Scale for PPC use, as it might cause flashbacks of "Celebrian" in unwitting agents. |