Bathroom Related Puns

Dad: Don't use it all!

First post, long time lurker. I've never heard this one before and had to share with you guys! Any other bathroom related dad jokes?

A C, an E-flat, and a G go into a bar. The bartender says: "Sorry, but we don't serve minors." So, the E-flat leaves, and the C and the G have an open fifth between them. After a few drinks, the fifth is diminished and the G is out flat. An F comes in and tries to augment the situation, but is not sharp enough. A D comes into the bar and heads straight for the bathroom saying, "Excuse me. I'll just be a second." An A comes into the bar, but the bartender is not convinced that this relative of C is not a minor. Then the bartender notices a B-flat hiding at the end of the bar and exclaims: "Get out now! You're the seventh minor I've found in this bar tonight." Eventually, the C sobers up, and realizes in horror that he's under a rest. The C is brought to trial, is found guilty of contributing to the diminution of a minor, and is sentenced to 10 years of DS without Coda at an upscale correctional facility.

One of my relatives exited the restroom at our house. She called out, "The bathroom's free now!" Without missing a beat, my dad replied, "Did we used to charge?"