You have to remember, this is back when chest hair was acceptable.
Those are mean streets out there and you need pants that won't get in your way when you kick someone's ass for their watch.
Beware all you gypsies, tramps and thieves! Sonny & Cher are issuing frontier justice wearing fuzzy vests and terrible pants. If you need me, I'll cowering behind a water-trough.
So, this is where Dr. Venture gets all of his sweet Speed Suits. The Fifth Season: a catalog for the modern super-scientist!
Note to parents. Don't dress your children up as though they don't have limbs. It creeps me out.