I’ve been thinking about it for several days, and have come to the conclusion that Elastigirl could indeed grow a dick. As shown in multiple scenes, she can stretch any part of her body to make it many times larger. Based on what she has done, it should be no problem for her to extend her genitals into a penis. This brings us to the second discussion point. Mr. Incredible has super-strength, and more importantly, super endurance. This means that his wife could easily expand her dick to several yards in length. The problem of fitting in into Bob’s tight asshole could easily be solved by inserting it while small, and ballooning up afterwards. I think the writers made them have these Specific powers on purpose. It seems unlikely that it is a coincidence that Helen has the ability to grow a massive dick, and her husband just so happens to have an indestructible anus. Therefore I conclude that not only does Elastigirl have the biggest dick in the world, she bones Mr. Incredible with it on a regular basis. And because it is a girl and a guy, it is by definition, not gay