The Surprise Y-Fronts

I ordered a dusty pink 'no-peep' blouse from M&S and instead got Paisley patterned 'no peep' men's classic briefs. I was tempted to keep them but they're 'large', so a bit roomy for me. I wonder if the large guy who got my dusty pink 'no peep' blouse decided to keep it, despite the tight fit?