With the song Transplanted Heart, Eugene went topical.
This song may be the clearest example of why Eugene is important as a view into how people were seeing things at the time he wrote which was the 1960s and 70s.
According to Google there are about 3500 heart transplants performed each year with over half performed in the US. Although that does not make the operation common or routine, heart transplants are not rare.
But this was not the case in Eugene's time, in fact the very first human heart transplant was not until Dec 6, 1967.
For centuries humans thought that the center of human emotions was our heart which is why, of course, the symbol of love is a heart. This may seem silly now, but it was what a lot of people still believed even in the 1960s and even people who didn't really believe it still played with the concept as if the heart is where we feel things, especially love and especially love that ends - the proverbial 'broken heart'.
Even now we still use the expression 'a broken heart' but that's probably because nobody wants to admit that someone else broke their brains.
So if you believe that your emotions are a function of your heart - then the obvious conclusion is that if you move a heart from one person to another, they will acquire the emotions that come with it.
In the late 1960s, a time when television was actually more stupid than now, the emotion transfer that came with a transplanted heart was a very common joke with standup comedians.
Which brings me to Eugene's song Transplanted Heart.
So although Eugene is not taking the emotion transfer seriously in this song which is evident from some of the silly plays on words such as the line 'why reject the love I knew', the fact that he is exploring the concept at all, shows the mindset and concerns that people had about heart transplants at that time.