Why did Rhett Butler say this?

Question

In the sequel why after Scarlet and Rhett had s*x on the beach why did he say that it was only a celebration of survival?

Answer 1

He was basically telling Scarlett not to expect him to still be in love with her, that the only reason he slept with her was because he was so happy they survived the boat wreck or whatever.  He didn't want her to misinterpret his intentions.