I knew a guy who - about 20 years ago, slept with both women in a lesbian relationship. As in - they cheated on each other with him. And somehow they formed a workable triad out of that that was pretty darn stable for like 10 years. Until he got caught cheating on them (after months, apparently) with someone in their social group - a younger, monogamous, ‘party girl’-type woman.
He didn’t want to break up with anyone, and all of them refused to ‘give up’ so now (10 years after cheating) he has two relationships - the triad, the “new” one, two houses, and now a kid with each woman.

He looks and acts sort of like a grown up version of Max from A Goofy Movie (Goofy’s son), is still ‘fixing’ the muscle car he bought in his college years, and has a 99% complete collection of every edition of Playboy magazine.

But to answer your question of what a guy with 3 (or more) wives should look like? Bill Paxton, circa 2011.

They have 3 dicks and 4 arms usually

If he’s getting sex; very tired with a smile on his face.