He watches idly as she gets a little more presentable. As soon as his caretaker shows up with a wheeled dolly with a large bucket, his attention drifts from Sybil to watch as his lunch approaches. After she greets Boxer and starts rigging up the bucket to be lifted into the tank, he turns to Sybil.

A fine idea in theory, but I won't be well enough to do something like that for a while.

The implication being that there's probably something else that needs to be done to quell his concerns if she's planning to take advantage of his libido again any time soon.