Is it possible to have a mastectomy performed for non-medical reasons?

I'm 24 years old, a B/C cup. My breasts can be uncomfortable, I don't like their shape, and I've been stressed because of them. I'm unsure if I'm entirely cisgender. I identify as female, but sometimes I feel less female and more male, but a feminine male. During those times, I prefer male pronouns, and I want a penis, but I wouldn't want to irreversibly change my physical sex. If my breasts were removed, I could still present as either gender, and I feel I would be more comfortable in my body.

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