Dr. Ellis believed that the sense of smell, although ineffective at long ranges, still contributes to sexual attraction, and therefore, to mate selection. In his 1905 book, Sexual selection in man, Dr. Ellis makes a claim for the sense of smell in the role of sexual selection. He asserts that while, we have evolved out of a great necessity for the sense of smell, we still rely on our sense of smell with sexual selection. The contributions that smell makes in sexual attraction can even be heightened with certain climates. Ellis states that with warmer climes come a heightened sensitivity to sexual and other positive feelings of smell among normal populations. Because of this, he believes people are often delighted by odors in the East, particularly in India, in “Hebrew and Mohammedan lands.” Ellis then continues by describing the distinct odors in various races, noting that the Japanese race has the least intense of bodily odors. Ellis concludes his argument by stating, “On the whole, "it may be said that in the usual life of man odors play a not inconsiderable part and raise problems which are not without interest, but that their demonstrable part in actual sexual selection is comparatively small.”