I bring things to a halt in a panic. "I've got to get to the hospital," I say. Pulling on some clothes, we rush out to get a taxi to Whitechapel Hospital A&E.
"If you can't see, how will you find the cash to pay?" jokes the driver. I'm not amused and slam the door behind me as we pull up.
Fortunately, I'm attended to quickly. An elderly man takes a shine to me (it must be my semi-undress, I think) and pesters the doctors on my behalf.
The culprit - a minuscule piece of grit - is revealed with red dye and removed with a tiny metal pin.
Sadly, by the time we get back home our oysters have somehow lost their aphrodisiac quality.