Here's the answer:
“그는 연애생활에 대해 말하는 것을 부끄러워해요”
Watch a real native speaker say it:
Here's how it sounds in a textbook:
Fun fact: the hundreds of thousands of people learning Korean with Memrise get this phrase correct 96.04% of the time!
Fun fact: the hundreds of thousands of people learning Korean with Memrise get this phrase correct 96.04% of the time!