Sometimes programs are measured by how many teens take virginity pledges, not whether the teens stick to them, avoid sexually transmitted diseases or unplanned pregnancies, says Rosenbaum.

• 他说，有时候一些项目只是去衡量有多少青少年做了童贞宣誓，而不是有多少人认真去履行他们，避免性病和意外怀孕。