Find the eighth head

Canvas, oil. 80x90 cm. The cost of the painting 158 thousand rubles. On questions of purchase write: artsur@yandex.ru Long thought how to call the work. All the time came variants with youthful dreams and fantasies. But stopped at this. It's a bit provocative, of course. For someone to find another, the main head will be problematic, but for those who know English and inclined to logical thinking it will not be difficult to do.
And it's a shame that the photo somewhat distorts the coloring of the painting. I tried to bring together different shades of warm (ochre, yellow, brown) and cold (from the deepest to almost white) tones. I don't know specifically what's wrong, but it's more harmonious in person. This is probably one of the few paintings that do not want to sell...Possible sending by mail.