Should you use Black or White in your Painting?

A short video explaining a rule that is often heard in art education. Is it ok to use black and white in your painting? I hope I can de-bunk this rule and show you where it's applicable and where it's not.
For longer more in depth tutorials visit me at   / emmacolbertart  .

For commissions and print sales visit https://www.emmacolbertart.com

Materials used and where you can purchase are as follows:

Pastelmat Paper:
https://www.jacksonsart.com/search/?q...

Unison pastels:
https://www.jacksonsart.com/search/?f...

Faber Castell Pastel pencils:
https://www.jacksonsart.com/search/?q...

The Unison colours shown in this video are as follows:
Light Alternatives: Grey28 (White), BE1, Grey27, Light 4, Grey29, Light16, Add19, Light12, BV1, BV7,
Grey Alternatives: Add27, Grey5, Add33, BV9, BV15
Black Alternatives: Grey36 (Black) Dark 22, Dark23, Dark20, BE24, BE6, BE36