There's been instances of ghosts having sex with people. For example, a husband was having really vivid wet dreams where he would be sexually deprived for the rest of the day and there were instances of the couple calling each other and then with their "I love yous" a female voice said "ugh" and the line hung up on both of them. When they did a cleansing of the house a voice screamed "he's mine" before disappearing. It's on Reddit dudes I'll get a link as soon as I can
https://m.reddit.com/r/Paranormal/comments/3xchp0/an_experience_my_husband_and_i_went_through/