Essential oils or fragrance oils
I can relate to that. I tend to do it myself with soap... and with flowers. I like fragrance a lot and in a way it's almost a wasted opportunity not to have a lovely smell (how can they breed roses that don't smell!). But I like to have the option to use pure and unscented soap when that suits me and add scent with a perfume if I choose to. I guess that the fact that there are so many allergies in the family contributes to my love of "no unnecessary stuff added" things.
I would not hesitate to fragrance almost all of my soaps with essential oils if they weren't so expensive. I'm still looking for a wholesale supplier that sells them in bulk, although not huge bulk, at better prices than the teeny, tiny little bottles that are most common. I have found some in the US and I buy a lot from there, but sometimes the shipping costs are so high that it doesn't make sense. I would love to find suppliers in Europe. France, Italy and Spain sound really exotic and I have thought about trying to find suppliers in India, but shipping costs are an issue there. I may have found a supplier in the UK, I have their website bookmarked and am browsing their selection. The natural colours that I am waiting for come from the UK - English is so easy).
I wrote before that I have a love/hate relationship with the colour issue and that is certainly also the case with fragrance oils. They are less expensive and, if I understand correctly, they last longer that essential oils. I use perfumes that are probably made with synthetic fragrances - I think Chanel no. 5 and Joy (a personal favorite for evening) are almost the only ones that still use real flower essences. So why not fragrance the soaps similarly? Fragrance oils are available in scents that are impossible to get naturally. Delicious Sweet Pea is an example! And honeysuckle! Oh jummy! And there are some suppliers that have such tempting descriptions to their fragrances that my credit card is dire danger!
Sometimes I long for a shedload of fragrance oils to play with, but then I wonder if they would be a turn off. Artificial and insincere! I just don't know!