I've had two couples receive it, one in Riverview where I made the female sim and she married a Townie (George Dean) she was Hopeless Romantic, but he wasn't.
The other one, I don't remember if in Appaloosa or Riverview, but they were a married couple that I created. I started their relationship out slow, had them be friends for a couple days, then start on the romance. Neither was HR, so that wasn't a factor for them.
I did notice that after he went to China he had dropped in his level of relationship with her, before he could do a little romance, kiss, hug and then WooHoo, but after the trip, he had to go through several before the WooHoo showed up.
I don't know how long it took, I wasn't paying attention; but I have my lifespan lengthened.