Coitus as a cancer risk

Nature 
Some cancer specialists blame permissiveness, promiscuity, and the 'copulation explosion' for the higher incidence of cervical cancer.
Incidence 
A study of cases at a British hospital in 1983 found that the number of women under the age of 35 with the disease had increased from 6 in 1972 to 83 in 1983.
Value(s) 
Type 
(D) Detailed problems