RJ was sick of it. Sick of his mother asking why she hasn't ever seen photo evidence of his "friends." The pain of Mother finding out about Gumpy, his imaginary talking platypus, still stung deep in the recesses of his hippocampus. Who decides what's real and what's imaginary anyways? If the definition of a "friend" is simply someone you can see and touch, might as well send a photo. She did give birth to him, by the way.