They notice that the feeling they get from doing that is pleasurable.
Besides, by promising to get to be able to the interviewer with the answer, you leave the door open for more contact. As was the highly sought after Incredible Hulk -- first immortalized as a comic book during the 1960's. https://Www.Gstd.net/bbs/board.php?bo_table=free&wr_id=2069359