Step 1. Get your boyfriend in a position it's hard to get out of. Step 2. Put his cock in your pussy. Step 3. Brag about how many guys you're cheating with while he tries to squirm away.
Oh, you're a Doctor? Great, I've been looking everywhere but it's so hard to get appointments, lucky me to find one on the train right? Anyway, I'm sure I felt a lump a few days ago. Like, it could be cancer so please check it through carefully.