Leaving the dog out to dry

Leaving one's penis outside of the presumed atire, solo (a.k.a. sans balls).

Leaving the dog out to dry is a euphemism which can be defined as, leaving one's penis external from the assumed attire.

In context: *Dave exits the gentleman's bathroom, penis exposed from his Chino Shorts.

Rhonda: Leaving the dog out to dry, are we?