I've only heard good things about chicken (& pidgeon) hearts, they seem to be a bit of a chef's treat.
I'll be honest, I had to down a few bottles of dutch courage before I was able to entertain trying them. I like my food but i'm not what you would call adventurous as far as offal is concerned.
They were offered up with a curried rice, cold, having been stored to reheat as a meal. Bless it, the meal never got time to reach the oven, as it was quite delicious. I was taken back and even went for a second. It was helped by the fact they were well cooked and sitting in a pungent curried rice. I would eat them again.
I think the problem with some foods is they either sound or look or sometimes feel quite awful. Taste is often the last thing to be considered. My wife hates prawn only because she can't get past the visual aspect of what they look like and bring her self to eat it.
Lung is the same thing for me, i'm not sure I could get past what it is and as for the penile extremities, not a chance.
I admire you for giving it a go though.