The Yorkshire joiner, who was voted off the show on Friday night, said that he is planning to meet up with the Beyoncé lookalike later this week.
Rachael, who was the first housemate evicted from the series, appeared on Big Brother's Big Mouth on Friday and kissed Nathan.
Speaking about the incident, he told DS: "I got a nice kiss and lipstick smeared all over my face. It was sound. I'm going to bang her out for lunch tomorrow or next week. It's all good.
"She's a sound girl. I want to get to know her before anything else, but she's a great-looking girl and she's totally sound as far as I'm concerned. We'll just have to see how it goes."
He added: "I absolutely fancied the pants off Rachel. I think she's a great girl. She's absolutely stunning. I can't regret anything with her because I didn't have enough time with her."
> Click here for our full interview with Nathan Dunn