BRAMPTON, ON—Having already been surprised that his wife Margot didn't demand he turn the lights off so she could pretend he was someone else, Alan Castillo was completely shocked Monday night when she yelled out his name during sex.

"It was totally surreal," Mr. Castillo said, adding that the last thing he ever expected to hear as his wife moaned in pleasure was the sound of his own name. "Trudeau and Denzel, I hear all time. That sexy Axe commercial guy is also a regular. Heck, even our accountant Larry merits the odd orgasmic shriek. But my own name? Now that's a first."

"It was also very sweet," Mr. Castillo continued, explaining that he was touched to know his wife was thinking of him instead of one of the array of literary characters, celebrities, and coworkers whom she usually fantasizes about as they make love for 10 minutes in total darkness.

"She could've pretended she was having sex with any man in the world," he said, choking back tears. "But she chose me."

Ms. Castillo said she was equally shocked by this unexpected moment of intimacy.

"Alan is usually the last man on my mind when I'm having sex with him," she said, adding that she was on a real George Clooney kick for a while, but is now more into "real-life studs" like Steve from sales and the cute waiter at that Italian place.

"But I guess sometimes you just gotta shake things up."