But Stuart Brody, a psychologist at the University of Paisley in Scotland, said it has to be full sexual intercourse to get the best results.
But Stuart Brody, a psychologist at the University of Paisley in Scotland, said it has to be full sexual intercourse to get the best results.
但苏格兰佩斯利大学心理学教授斯图尔特·布罗迪认为，完整的性交过程得到的效果最佳。