[No. That's absolutely enough. In fact, he will pay you to stop. Thankfully, being able to tune Sora out is enough, and after that initial moment of looking thoroughly disgusted, Joshua manages to situate himself back to a regular level of composure.]

No practicing on me, thank you.

[Clears. Throat.]

The problem you're going to run into with that is, you may not be in an adequate situation to sing someone out of your head at all times. If something is happening that cuts your attention short, that's enough to break the effect. Really, the only way you can reliably force someone out of your head is by being powerful enough to actually do so. And, unless you have some sort of mental capabilities that I'm not aware of, that doesn't seem to be the case here.