scopophilia

noun

sco·​po·​phil·​ia ˌskō-pə-ˈfil-ē-ə 

variants also scoptophilia

ˌskäp-tə-ˈfil-ē-ə 

: a desire to look at sexually stimulating scenes especially as a substitute for actual sexual participation

scopophilic adjective

also scoptophilic

-ˈfil-ik