Pretty sure the movie was about a vampire... I thought it had edward norton in it but when I imdb'd it I didn't see it... I don't know how old it is...
There is a super or janitor of an apartment building and he is super shy and he builds a cage in the basement to hold a girl vampire. Somehow he gets one in there and she begs him to let her feed. When he doesn't, she lures someone else down into the basement and convinces him the super has abducted her. She feeds on him. She convinces the super to bring her a douche from work to feed on.
I can't remember the name of the movie and it's killing me.