I'd finished doing a long stint at work and hadn't been able to 'unload' for three days. I was very sexually frustrated! I decided I'd go round my friend Sarah's flat for a coffee with her and her boyfriend.So I arrived at the flat, rang the bell and she buzzed me in. I walked up the stairs and through the door. I sat and chatted with Sarah about work while I smoked a roll up out the window. I couldn't help but notice her...