<unk>  is how the body reacts in different stages of the sexual response cycle, or as a result of sexual dysfunction. Relevant aspects of<unk>  are defined on the basis of a modified version of Masters and Johnson's work. The aspects of<unk>  defined as being relevant to the assessment include sexual desire, erection, orgasm and ejaculation. Guidelines for assessing<unk>  are suggested and divided into four stages: Stage 1 deals with the documentation of the defined aspects of<unk> . The main questions are: #Is the<unk>  intact? For example: Have there been any occurrences of erections or orgasms during a given period of time? #If the<unk>  is intact, what is the frequency and/or intensity of the<unk> ? For example: How often has the person had an orgasm or erections during the given period of time and how intense is the orgasmic pleasure and erection stiffness compared to youth or the best period in life. The suggested explanations for the absence or waning of<unk> s at this stage are physiological and psychological. 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 3 it is estimated if or to what extent waning<unk> s and/or activities cause distress. Stage 4, the association between the distress due to waning<unk>  and well-being and emotional isolation is assessed. These guidelines were constructed to assess male<unk>  in relation with treatment for prostate cancer. However, the concept has been modified and adapted for females.
Sexual function
Sexual motivation and hormones
Body image 
Sexology
Face
Visuospatial function
Physical strength
Body shape