Fatal confusion! How could that happen to me?

For about a month now I have a friend who is super great! Well, during sex, he could still step on the gas a little more and be persistent! His family is nice and his twin brother (except for the moving eyes) is also very nice. The two differ only in a small detail, a birthmark on the left foot. Now I have given my friend the key to my apartment so that he can come straight to me in the evening after work. I wanted to surprise him with a romantic bath, candlelight, and hot sex so he could relax on a stressful day! But something was different and in the end the shock came! I don't know how that could have happened to me !! I never would have expected that something like this would be possible at all!