If you’re at all interested in making your own parfum or cologne/aftershave etc., then you might want to visit www.snowdriftfarm.com for essential and fragrance oils, perfumer’s alcohol, formulator’s alcohol, etc.
I find that Tea Tree Oil (Melaleuca alternifolia, from Australia) has a camphor-like odor that will cover just about any other scent. It has antiseptic and antifungal properties. A one-ounce bottle costs about $6.00 USD.
(In comparison, the Tunisian Neroli oil --the kind Michael is using as the ‘light cover’ sells for $195.00 per one ounce.)
Fragrance oils, unlike essential oils, are synthetics in whole or in part; Snowdrift’s Jasmin Neroli fragrance oil is only $4/oz. They have a number of knock off blend scents, e.g. Kenneth Cole, Hanae Mori, Theirry Mugler, etc.
Parfums are roughly 20-30% oil (essential or fragrance), colognes 15-20%, eau de cologne 12-17%, eau de toilette 5-10%, aftershave 2-5%. The site gives useful advice on formulating your own scent – which might not be as popular as famous name parfum, but
You can say “I blended this fragrance myself.” 