glass eye joke

[the insaan]

A bloke walks into a brothel and says 'I want something unusual, something different'. The pimp sends him up to room 95 wherein lies Griselda with the glass eye. Not knowing what to expect he asks what the deal is, she whips out her glass eye and invites him to use the eye socket.
half an hour later he lies smoking a cigarette and says to her 'That was fantastic, I will come back the same time next week'. she replies:
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'Ill keep my eye out for you'