"Chin up, a little to the left, shoulders back, stand on one foot, hold your breath...hang on, don't move." Any photographer worth his salt should be able to pose you in an elegant and attractive position. Do you know the reason for all these the contortions? By lifting your chin you banish the double chin.
Holding your elbows away from your body reduces the apparent width of your torso and accentuates the bosom. Shifting your weight to your rear foot cocks your hips into a position that gives you a sexy curviness. There are many other little tricks your photographer may teach you. Just listen and he will not lead you astray.