Inspired by another poster's idea of a sexy post woman arriving at the door I thought I'd suggest turning it around, have the model open the door to the postman, she gives him a look up and down before smiling and saying something along the lines of "You have a package for me eh? I can see that! [looking at his groin] I can't wait to get my hands on it!". I guess she'd wear either a losely tied dressing gown and nothing else or maybe some lingerie, a bit of a just out of bed look. the whole thing would end with her taking his special delivery all over her tits.