[1] Relevant aspects of sexual function are described on the basis of a modified version of Masters and Johnson's work.
The main questions are: Stage 2 deals with the assessment of the frequency of different sexual activities, such as intercourse, within a given time frame.
The possible explanations for an absence or a decreased frequency of sexual activities may include physiological, psychological, social, religious and ethical reasons.
Stage 4, the association between the distress due to waning sexual function and well-being and emotional isolation is assessed.
These guidelines were constructed to assess male sexual function[3] in relation with treatment for prostate cancer.