The conclusion that Gillisson do is a little strange, for those who had sex've probably also less likely kissed a lot of people, and those who have had sex probably has considerable experience of kissing, a Finnish study also suggests that oral HPV at one spouse increases the risk for oral HPV in other spouse. Then she misses age oral HPV is common in the elderly, those who have not had sex are usually younger.
She also writes in later studies that no specific sexual activity can be directly linked to oral HPV, they do not really know what o how it infects, recent surveys that you can google up shows a very strong correlation between periodontal disease and oral HPV, something that makes it can infect and gain access to the basal layer, but not least infection that makes the infection becomes persistent, periodontal disease is very rare in young people, people who do not smoke or drink, and it is in this group that while kissing is rarer that when conclude that it is the absence of kissing that makes you not have oral HPV, when so many other things come into play ......... Only HPV is not likely to cause cancer, even if the connection is hpv cancer does not mean that the link-hpv kissing or oral sex, is strong