Adding further onto your point emphasizing why this will be severe: Borrowing will become more expensive, and we can't just stop spending to stop borrowing. Much of the current debt is in short term positions that regularly get re-issued. The cost of issuing new short term debts just to replace the current ones coming due will increase even if spending stays the same (or decreases).
And of course, there's a huge impact to the dollar's value internationally if major financial markets shift away from holding US debt. You know the trade deficit Republicans like to rage about .... Yeah, it'll get a lot worse when fewer people want to hold US dollars for the purpose of investing in US bonds.
Added emphasis, as it kind of answers your own question. Being sexy to someone isn't universal. There's certainly things more women tend to find sexy; but it's not an absolute by any means. Think of all the happily married people you have met (assuming you live in a fairly large community). Or even consider all of those in long-term relationships. Not every man in every relationship is super fit and sexy, right? Nor were all the men such when they first met their partner. It is not a requirement! And if you know enough such couples you'll realize appearances of the men in them run the gambit from hot-bod to dad-bod and beyond. And if fact most people in happy relationships are far from the media archetype of "sexy male" as you allude to in your original post.
Not every woman is a lingerie supermodel; not every man is a bodybuilder or Hollywood heartthrob. Yet so many people are able to find relationships where they each find each other sexually desirable. Just randomly scroll through strangers (real poeple) on a social media of your choice and you'll see happy couples with all variety of body types and appearances.