The invention of the Portal Gun
 

oh... that's all kinds of twisted!

Gordon Freeman, you're needed in Aisle 7

I just wasted like 10 minutes of my life trying to figure out this joke with Wikipedia.

THATS WHAT YOU GET FOR NOT PLAYING VIDEO GAMES. Jagged Alliance? Microsoft Flight Simulator I? Janes Flight Sims? Fallout 1? :D

Very nice.

I was curious about the possible mechanics of this, so I searched and found the following. I'll link, so it doesn't NSFW the thread.
Image 526466: Portal

Further related:
Image 39844: Chell Portal Trystalk Weighted_Companion_Cube valve
Image 275459: Chell Portal
Image 178248: Alyx_Vance Chell Crossover Half-Life_2 Half-life Legio Portal Weighted_Companion_Cube

Holy crap, Redlemon! I thought of about 20 twisted portal cartoons before I drew mine; including a few that involved self-administered oral. But lesbian dildo tit-fucking was never in the mix.

I am both saddened and relieved to see that there are cartoonists who are more twisted than I am.

I am surprised NOT to see any evidence of the weighted companion pube.

Well... I only posted some of the links. I decided not to link to images of furries and/or shemales. But, this was the best companion cube one:
Image 370709: Dueling_Analogs Mario Nintendo Portal Question_Block Super_Mario_Bros. Weighted_Companion_Cube featured_image webcomic