In Ifrane, lilac trees, plane trees (platanes), chestnut trees(marronniers and châtaigniers) and linden trees (tilleuls) were all imported for thispurpose.

But he wrote in this book, Ideal Marriage he said that he could differentiate between the semen of a young man, which he said had a fresh, exhilarating smell, and the semen of mature men, whose semen smelled quote, Remarkably like that of the flowers of the Spanish chestnut.