A prospective study of 94 Dutch adults who have casual sexual partners exam
ined whether two important aspects of safe sex. namely bringing up condom u
se (BCU) and actual condom use (ACU) are intentional or habitual. For each
of these aspects, a model based on the Theory of Planned Behaviour (TPB: Aj
zen, 1991) was pitted against a similar model that was extended with a path
from past to later BCU and ACU, respectively. The results suggest that bri
nging up the issue of condom use was equally predicted by intentions and pa
t BCU. However, among people with casual partners. using condoms - and more
importantly not using condoms - was especially predicted by past ACU, Sugg
esting a strong habitual component. These results are discussed in terms of
their implications for safe sex education and the use of theories in safe
sex promotion campaigns.