I think this is a song about masturbation, sung to a potential lover. I think the reference to the hot bath is the "direct" reference, and when she talks about "to those nice nice nights", I think the operative word is "to", as in, she's remembering past boyfriends. Remembering past birthdays in which, metaphorically-speaking, they're in her "dark cupboard" with a "great big cake".
I think the chorus is meant to say, "would you like me to think of you, too?"
I think this is a song about masturbation, sung to a potential lover. I think the reference to the hot bath is the "direct" reference, and when she talks about "to those nice nice nights", I think the operative word is "to", as in, she's remembering past boyfriends. Remembering past birthdays in which, metaphorically-speaking, they're in her "dark cupboard" with a "great big cake".
I think the chorus is meant to say, "would you like me to think of you, too?"