Danm! Those are horrible! I can't believe that was ever in fashion.
That outfit on the guy on the left makes him look like a cross-dresser in training.
I have no problem w tidy whities and muscle t (or as we always called em Wife beaters) even in colors (I was issued Brown ones in the army) but those floral patterns are "pretty" (pun intended) awful
Definitely not underwear that's fun-to-wear.
I think the undie model on the left might be Douglass Barr from The Fall Guy.
The 70's = collective nervous breakdown.
I don't know about others but when I'm in my underwear I always hold my hands behind my back