Even Predators have a sense of modesty it seems

I just knew this topic was started by you dk! :)

They value their junk, so keep it safe & secure! 

Captive Yaut'ja: "These are my prized family jewels!"

Two other observations from the pics:

1- Predators don't seem to enjoy sensual massages 

2- IDK if it is lighting, but is that a face on the jewel guard? 

Say what you want but I bet you looked.

perhaps their junk have mandibles too? 

Just putting it out there   o_0

maybe it is a purely scenographic choice, not everything must always have a meaning that corresponds to our questions, or that must answer our questions.

Good. I bet the Predator's junk is scary to look at too.