Turn Someone's Head Meaning

Example : 1901, Jack London, "A Hyperborean Brew":  [I]t was plain that power had turned his head, and he would not be satisfied till all the power and all the wealth rested in his own hands. So he became swollen with pride, forgot it was I that had placed him there, and made preparations to destroy me.1906, Mark Twain, Chapters from My Autobiography, ch. 1:  I should not want him to make a fortune—let that come later. It could turn his head, at his time of life, and in many ways be a damage to him.1900, Irving Bacheller, Eben Holden: A Tale of the North Country, ch. 20:  Young men at Hillsborough—many of whom, I felt sure, had a smarter look than I—had bid stubbornly for her favour. I wondered, often, it did not turn her head—this tribute of rustic admiration.1904, Harold MacGrath, The Man On The Box, ch. 2:  I often marvel that the women did not turn his head.