We need to make the "wait I'm a ghost so I can't fuck" plot beat happen after all
I've seen plenty of ghosts who can.
If we go by Japanese myth, ghosts can fuck all right. They'll come out of their graves at night, pick you up, take you someplace private and bang your brains out! And if you both liked it, you can keep seeing each other! Wheee!
Of course one morning the city guard will find in a ditch, on some random street, your dead body hugging a skull and some old bones. Oh well -- nobody's perfect, as Joe E. Brown said. ¯⧵_(ツ)_/¯