First homosexual experiences of 96 homophile subjects First Homosexual Contact First Oral or Anal (any method) Intercourse 0 to 10 years 29 persons 7 persons 10 to 14 years 29 persons 13 persons 15 to 18 years 24 persons 26 persons 19 to 24 years 11 persons 26 persons Over 25 years 3 persons 9 persons
Bieber 1962, p.338, cited by Brongersma 1990, p.372
First intercourse for boys, Denmark, 1968 Cumulative 13 years and less 02.0 % 02.0 % 14 years 04.5 % 06.5 % 15 years 09.0 % 15.5 % 16 years 16.5 % 32.0 %
Hertoft 1968, V.2, p.32 cited by Brongersma 1990, p.217)
First intercourse for boys, USA, 1948 Cumulative 13 years and less 13.8 % 13.8 % 14 years 14.0 % 27.8 % 15 years 11.0 % 38.8 % 16 years 12.8 % 51.6 %
Kinsey 1948, p.550, cited by Brongersma 1990, p.217