They're all underexposed some I think.
In 1 they have no hair detail for the most part. You left room to the left, but barely got the sexy part of her butt. I'd darken up the background so you can see so much detail in it.
In 2 you chopped at his elbow and hand. Focus is good I think but it looks like both of her eyes and one of his were dark. Did you use on camera flash? I think the pose makes her arms look bigger than they actually are. Like a short focal length with their heads and tops leaning towards you more than their waists getting some distortion.
For 3 it's just a lil underexposed, her elbows are chopped, but there's dead space to the right of the frame. Focus looks good, but I'd brighten her eyes.