How to decipher the sentence "busk, don't sell yourself"

How to decipher the sentence of busking and not selling yourself, in fact, this sentence is understood as the present sentence. That is, you can let me show you my talent or do something in my job. If it goes beyond this range, I can't do it. The phrase "busking, not selling yourself" is an old saying in the past. It means that some women are very talented. But it needs to be done in some romantic places. I didn't sell myself for myself. So the best understanding of this sentence is that I can sell my talent to you. But I won't betray any part of my body.