The slightly painful tingling, itching, arousing feeling felt in the balls when thinking about, watching, or hearing the "dog-in-a-tub" sexual manuever being performed.
As I watched my roomate struggle while trying to perform the dog-in-a-tub move on his girlfriend while she moaned I felt a strange twingle in my loins before I forced myself back to work studying for my finals the next day.
5👍 9👎