We like to imagine these as the symbols on the bathroom doors on the Milano, Star Lord's spaceship. All five of them. You know, at that point, it might be easier just to create one unisex bathroom, but it seems unlikely that the same accommodations are going to work for Groot and Rocket. Well, the peeing in a hole part would be fine we imagine, but the sinks would be a pain for both. And we can't imagine Rocket tipping some guy to hand him a towel...