Perfume comes from many sources: flowers, tree resins, herbs. One source that is a little controversial is the glands of animals. Musk comes from the civet, something like a mongoose, the North American beaver, and from the Asian musk deer. Of course, most of these compounds can be replicated through chemistry, but synthetic or not, a good perfumer should be familiar with the secretions that certain glands can naturally produce.
We applaud Black Phoenix for getting involved with glands. (We’re, on this site anyway, extremely concerned with the adrenal gland.) In Black Phoenix’s case, they have turned their attention and imagination to human male testicles.
Or in more common parlance: balls.