Stunned that I am first to post this...
They’ve probably have to have a higher than normal casket to accomodate the body.
Cute, but the engorgement goes away immediately after the heart stops pumping; a little known fact is that Viagra was developed as a high blood pressure pill to relax blood vessels, it was very promising but the unintentional side-effect of easily stimulated erections at inappropriate times and situations caused them to shelve it.
One day, the proverbial light bulb popped on and the defect of popping up became the marketing dream of advertisers of yore, the next best thing to an immortality pill.
The rest, as they say, is history.