I was always taught to believe what I see with my own eyes. I will use the most recent 'relationship' as an example.
What I saw was Josie lusting after JJ, and JJ treating her more like a sister/mother figure. Whilst leading her on. Saying in the diary room time and time again that he did not fancy her. And then suddenly becoming more keen after she got the pass to the final
Then they leave the house and all of a sudden its all 'I'm in love with Josie'
And people believe it?
Nah. BB housemates know that relationships sell/keep them in the house longer. Thats all. Sure there were bound to be a couple of 'real' romances with the sheer amount of people that have been thrown together over the years, but the majority is for cameras and $$$.