wrong boner

An erection (or boner) achieved whilst watching inappropriate or even non-sexual material, such as scenes featuring:

1. Incest
2. Children
3. People dressed as manatees
4. Cartoon characters
5. etc.

"I got such a wrong boner watching..."

1. The sex scene in Oldboy
2. Natalie Portman in Leon
3. Manatee porn
4. A pixelated Sonic The Hedgehog with porn sounds added on YouTube
5. A picture of a shoe