Ooh Matron! I've got it in! This cartoon is in the latest edition of The Jester: The Monthly Magazine of The Cartoonists' Club of Great Britain. The theme this month was innuendo. I'll just say this; it was a very smutty, filthy read and very funny.
I don't think any other nation uses the double entendre like the British do. I think we like to slip one in at any given opportunity. No matter how difficult a situation may be, I feel we always rise to the occasion. We maintain a stiff upper something or other (etc. etc.).
The chap in bed is loosely based on Sid James. The nurse is loosely based on Shirley Eaton. After several, miserable attempts to draw a pretty woman I decided to use Gil Elvgren as a template artist. In closing, I'll just say this; if you put your thingy over the picture and click it, you can see it get bigger. Fnarr fnarr!