I see a lot of people calling BS on this study in the comments. Rather than get pissed off at the political incorrectness of this study, can we all just absorb it as an interesting sex-knowledge video that may not necessarily represent modern day society, but it may very well have been completely viable back in the day. Unless there are similar studies conducted with more recent participants we can't really be conclusive when we talk about it.
Good video and made me shoot a big load as well, all over my screen and keyboard. Pity it was not in her mouth.