In my experience, cats tend to mellow with age. So a cat that will not allow cuddles at 5 will be fine with them at 10 or 12. But you can't really hurry it along. My cat absolutely loves attention, she wants to be petted and scritched and near the humans constantly (in fact, I'm trying to type this while she lies on my arms. It's a challenge). She even likes being picked up and held, but she has no interest in laps. If I pick her up and put her on my lap, she hops off. She enjoys cuddling up next to me though. She's only 2, so I wonder if she'll become a lap kitty as she gets older.