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.
You crave the teasing, don't you? You crave that delightful pain you feel as your cock tries to get hard. You crave the knowledge that she's not going to let you out, that she owns your dick and she likes to keep it locked.
