This guest art is by Kenji Watanabe. Who is Kenji Watanabe? Beats me, frankly. I’d love to link him, but I don’t think he has a site.
About 2 years ago I decided to start branching out a bit and also support some of the artists who do their stuff at cons by commissioning some drawings to use as clip art in the strip. Kenji Watanabe had a booth at Penguicon 2.0. I explained my strip to him, that I needed a drawing of two figures in conversation, and needed rights to print the art in that context. He agreed (nice guy), and I paid him whatever his going rate was ($10 or $15 or $20…I really can’t remember). And he bought one of my books. 
Anyway, I did the obvious joke here. It was my second variation on that theme. Here is your DVD bonus script tentacle-sex joke:
Panel 1
Captain:
IT’S FUNNY THAT I CAN WORK
SIDE-BY-SIDE WITH A TENTACLED
MONSTER. MY ANCESTORS WOULD
HAVE BEEN HORRIFIED.
Alien:
AH.
Captain:
YES, ANCIENT HUMAN LORE IS FILLED
WITH TALES OF SEA MONSTERS AND SLIMY
CREATURES OF THE NETHERWORLD. IT’S
A FIXATION OF SORTS FOR MY PEOPLE.
Alien:
MM.
Panel 2
Captain:
THE JAPANESE, FOR EXAMPLE, HAD A WHOLE
SUBCULTURE OF ART AND LITERATURE REVOLVING
AROUND SEXUAL RELATIONS BETWEEN HUMANS
AND TENTACLE BEASTS.
Alien:
SO YOU’VE SAID.
Captain:
AH, DID I? THAT’S RIGHT.
Panel 3
Captain:
AND YOU SAID YOU DON’T DO THAT.
NOT EVER.
BUT WHAT ABOUT SPECIAL
CIRCUMSTANCES, SUCH AS…
Alien:
CAPTAIN, YOU’RE ABOUT ONE
RHETORICAL HOP FROM A
SEXUAL HARASSMENT CHARGE.
