Spectatoring
Spectatoring is a process suggested by Masters and Johnson (1970) that involves a person focusing on him or herself "from a third person perspective during sexual activity, rather than focusing on one's sensations and sexual partner, can increase performance fears and cause deleterious effects on sexual performance." To help individuals with spectatoring, some therapeutic interventions focus on redirecting the focus of attention from oneself to one's partner, while others such as sensate focus, involve focusing on and enjoying one's own sensations of being pleasured. References

Further reading 
 

Sexology