No! Actually you could, but your hair would have to be shorter… messy.

[He’s tempted to change that, but instead gets up and walks around.]

Hang on… eyes on the mirror.

[He’s just going to change the reflection, and the hair on Xue Yang’s head changes to match his goatee. If he were to reach up, he’d feel his hair is unchanged. This is all the magic in reflection.]

Uh, she’s a fashion designer? She makes clothing, I wear it so she can see it as a realized image.