As reported here:
A German couple who went to a fertility clinic after eight years of marriage have found out why they are still childless – they weren’t having sex.
The University Clinic of Lubek said they had never heard of a case like it after examining the couple who went to see them last month for fertility tests.
Doctors subjected them to a series of examinations and found they were both apparently fertile, and should have had no trouble conceiving.
A clinic spokesman said: "When we asked them how often they had had sex, they looked blank, and said: "What do you mean?".
"We are not talking retarded people here, but a couple who were brought up in a religious environment who were simply unaware, after eight years of marriage, of the physical requirements necessary to procreate."