A new offering from Starbucks, perhaps?

Not exactly.
Muffins, in this case, refer to those singularly unattractive doughy things that somehow seem to overspill the tops of trousers, “menopaunches.” “Moobs” is a conflagation of man and boobs. (Thank you Howard Jacobson of the London Independent).
My apologies, Jack…clearly not a camera ready pose.
What’s a guy to do?
His and hers.
If having a honey caught rifling through your underwear drawer might have been grounds for divorce, it appears that this might no longer be the case.
He is looking to try on your “suck you in, lift you up, jiggle containment” garment. After all, if it works, why not?
Except, perhaps, as a prelude for an evening’s amorous romp. As women have known for sometime, the truth spills out.
Spill, unfortunately, is the operative word in that sentence.