clean shaven men

@Thinkbeauty - I agree that Firefly should be able to better understand terms like 'clean shaven'. It does get confused by some. I tend to try keep the prompt as simple as possible. The more words yopu have, the more likley something will not be included.

My tests with your prompt
"mature man..." almost always gave a older men with grey hair.

Here is the closest I got to what you may be after:
"Smooth-faced man, blonde, green macaw perched on arm, wrought iron fence behind. Mountains in the distance. Magical tone and feel, hyper realistic"

I tried many variations to try get a clean-shaven face including - 
Barefaced man - reulting in other bare elements

Beardless - not great in having no beard

So, my takeaway is that we need to keep experiementing with different ways of describing what we want. Hopefully Firefly will get smarter as our expectations of it continue to grow.