In a letter written during 1913, he writes, "I should like to know why nearly every man that approaches greatness tends to homosexuality, whether he admits it or not ..." He is also quoted as saying, "I believe the nearest I've come to perfect love was with a young coal-miner when I was about 16." However, given his enduring and robust relationship with Frieda it is likely that he was primarily "bi-curious", and whether he actually ever had homosexual relations remains an open question.