A lot of times we don't really care as long as they let us do it. It's like a dominant/submissive thing. She took ALL of his cum like a good girl even though she didn't love it. It's a turn on. Granted, cum sluts are also a turb on. Turn offs are cum dodgers and complainers. Either take it like a submissive or love it like a slut.
Something about this girl...not my type, but I favorite'd this a long time ago and then I just thought of it now and watched it for the first time in probably years.