I don't believe any of that shit obviously. I was simply giving a few of the excuses some people use to justify their stupidity.
I have to admit, I've also slipped up a few times in the past. At least it was with people who I had been tested with, so the only risk was pregnancy.
Nowadays I won't even do that though, cos these chicks are deceptive as f*** and if she cheats and comes back to f*** you, you could end up getting diseases.