Being erotic and spontaneous means you can't be sexually responsible?

[jenk]

"Ms. Reath, the New York family planning adviser, says that for young women not in a stable relationship, she still recommends condoms, either alone or in conjunction with another birth-control method, in order to prevent sexually transmitted diseases. "Younger people are more likely to make erotic and spontaneous decisions," she says. "[The rhythm] method is for sexually responsible people." " - Quoted in a WSJ article on an updated version of the rhythm method.

I wonder what Ms Reath would consider being "sexually responsible".