Because my last bulb burned out, and I'm single

I'm a lot like a bat.
You know how bats find their way about in the dark, bouncing a high-pitched squeak off of objects as a sonar that allows them to navigate in the blackness. I've been doing this a lot in my apartment these last few days, except only I do it with my testicles and my desk. The high-pitched squeak remains the same.