Well guys, this topic got heated!! So - I've worked in the medical research industry for over 40 years. Specifically in filtration of blood borne viruses, STD's and later, AIDS. I spend my shifts in a full bio-hazard suit in a sterile room. I'm currently helping to develop a £2 coin size filter which can sift pretty much anything from blood and they cost nearly £12,000 each!
I can honestly say, I have never come across a case of someone having their cock cut off due to a sexual infection. It's an Urban Myth. Even with advanced Syphilis back in the day, they used to treat you with Mercury - which just killed you anyway with heavy metal poisoning! The only cases of penis removal I've ever had verified as true are due to cancer, or a certain notorious South American parasite which can enter your cock if you have a pee in a river.
Even so, as a long time punter, adulterer, womaniser and thrill seeker, I would never fuck a WG bareback. I would not lick her pussy if she offered bareback, and I probably wouldn't accept OWO if she offered BB either. STD's can be transmitted orally, so I probably wouldn't even want want a kiss either. Just steer well clear.
Guy's, if you believe the Daily Mail, just having sex with your wife, or a quick wank, is dangerous! You'll go to hell. But I have 2 rules which I stick by every time. If the girls breath smells great, and she is as freshly showered as me, I'll go ahead.
Any questions, drop me a line and I'll try and answer. Bear in mind I'm NOT a doctor - I can't diagnose a problem - I'm a researcher/developer. But 6 years Uni and the rest in the industry has given me a lot of knowledge. Just be sensible guys - and let the big head on your shoulders make the decisions.