Years ago I was skating in some serious heat during summer in Japan and would often have to drive 45 minutes home before I could shower and change fully. I got these gnarly sores on my upper thighs under my balls and when I went to some asshole geriatric doctor in the countryside he told me I had herpes. Anyway, the sores didn't go away and 3 weeks later in my home country I went to the STD clinic and they were like: "who the hell told you you had herpes this is just a fungal infection?". The doctor told me if you have the mouth form (I do) it is way harder to get the genital kind. She also said loads of people have it, it is just some people's immune systems are not good at supressing it and show. I don't think they will even do a blood test for it in the UK. The way she described it was that the stigma was way more of a problem than the medical side of it.
Anyway, point is, for three weeks I had to confront the possibility of what life would be like living with it would be like. At no point did I think I would be having any kind of sex without disclosing it. It was really rough on me mentally and I could not imagine putting another person through that. So basically fuck Johan, guy needs a fucking slap, what kind of guy gives three different diseases to different girls? If your fucking around wear condoms or at the very least get tested regularly and be honest!