Bass guitar creaks while tuning?

Occasionally while tuning my bass / doing an extreme bend I can hear a creaking sound? my friend says this has something to do with my guitar have a plastic nut instead of a bone / graphite one.

Is this true?

The stories are varied, sorted, and some, like all good steely yarns are mythical.

“Dude, I walked in to this ol’ fisherman’s shop and there, hanging on the Read more »