Sexual activity from psychosomatic point of view

Hello!

I'm Cristina, new on this forum.

I really need your help with a topic I find diffcult to understand its meaning.

I have to write a scientific paper for Uni on a topic called "Morphological and functional support of sexual activity from psychosomatic point of view ". The problem is I don't really know if it reffers to:

1.the relationship between sexual response cycle (Masters&Johnson model) and what happens in the brain during sexual intercourse (psychologicaly)

2. psychosomatic dysfunction reffered to desire, arousal, orgasm and sexual pain.

or

3. endogenous ( perspiration, pheromones) and exogenous factors (how the partner looks, talking during intercourse, light intensity, humidity , clothing, temperature, colors, aphrodisiacs) which influence the sexual intercourse

Could anyone help me to figure this out?

Thanks in advance!