to be fair to the composer, the song was written about 20 years before rohypnol was first synthesised, so "what's in this drink" was more along the lines of "gee whiz, this is delicious! you must tell me how to make it!" and he and his wife always thought of it as "their song" in which she was being deliberately coy and all "what would the neighbours think" in order to tease but with every intention of staying.

in the composer's original interpretation, the "mouse" has all the power and is only saying "no" to have fun