Good cod! You're sexy

A queasy academic from the University of North London contacts the diary after dining in the university's training restaurant on "aphrodisiac day". On the menu: oysters, asparagus and cod. Cod? Not a food normally associated with seduction, surely. But helpful students have provided an explanatory leaflet:

"The delicious flavour and aroma resembles the most intimate regions of the human body". Our academic is opting for asparagus next time.