remove alias spanking -> spanked
Spanking should be for the action itself, while spanked should be for the visual state that comes after the action (ie. a red butt). The spanked tag is currently being used for both, but they're not the same.
Examples of spanked: post #708580, post #1313453, post #1310368
Examples of spanking (without spanked): post #740059, post #1480265, post #1261077
Examples of spanking + spanked: post #1446896, post #1222609, post #1306578