Playing a trick with a zipper

Beautiful Milka and her boyfriend are planning to go out. She takes a shower, puts on make-up, and chooses the best dress to underline the beauty of her body. Milka puts the dress on, but she can't zip it on her own because the zipper is on the back. Luckily, her boyfriend is always ready to come to the rescue and give her a helping hand with that zipper, though he decides to unzip the dress and spend time with Milka at home.