She said it was from CIM and when I spoke to a doctor once regarding this he said a lot of the times they don't always know how HIV is contracted because a lot of couples will do oral and sex and other activities so its not always straight forward.....plus even though its a small percentage for catching HIV via oral there must be some that do.
A lot of people go on about the worry of HIV but Hepatitis can be just as serious and you can die from that and live with it for years and not even know you have it.
Anyone going punting should get vaccinated against Hep B. No question. The girls should be too. I nderstand the more professional parlours arrange this through charities which look after sex workers. One of the key differences between the 2, for Hep B, there is a prevantative vaccine.
The article I read referred to studies involving gay men. Those which practiced oral only and therefore not anal, did not present with HIV. That's where the evidence came from. I would urge all to do their own research and not get their sexual health advice from a punting forum.