This is a sample of the work of Tom Poulton.  Tom was a well-respected graphic artist and illustrator working in the 1940s and 50s.  A large collection of erotic drawings were discovered after his death and published by the Erotic Print Society.  This is a scan from one of their books.

Poulton seems to have made these pictures for his own gratification and they could never have been published in England in his own lifetime.  Had he lived today, he could have set up a paysite and made himself rich, I guess.

Poulton is a very skilled draftsman; he seems to have worked quickly and with great fluency, creating scenes from his imagination.  It appears that he worked with soft pencil (3B - 5B, I'd guess) on any old paper he could find.

If you're curious to know what the grafitti says, it's this: Get your boyfriend to lick and suck your cunt and arsehole while you play with his prick and balls.  Mine did last night - it was smashing.  Got his nose right in when he licked me. Just you try it, I came five times.