The speaker recalls a conversation about bird-watching, which they had not remembered until reminded. They note that the other person pursued this interest while at Oxford, but express a lack of personal interest in the hobby. They acknowledge that bird-watching might be engaging and beneficial for spending time outdoors, avoiding drinking establishments.
Continuing the exchange, the speaker inquires about the process of bird-watching. They humorously suggest that it involves hiding in a bush and using binoculars to observe the birds as they come into view.