The X. Y. Z. of love frank answers to every important question about sex in today's world /
Hegeler, Inge.
Hegeler, Sten.
Krag, Eiler.
Hohnen, David.
London MacGibbon & Kee
1970
Originally published as 'Sporg Inge og Sten'. Kobenhavn: Rhodos, 1968
Sex.