A bush of a tail sprouted from his spine as his body contracted, writhing.

His body contracted, all his muscles tensing, and then she felt the movement deep inside of her.

Her whole body contracted with a violent jerk and she let out a low moan.

My whole body contracted in a convulsive spasm, but the peyote wouldn't come up.

Her body contracted with a sob that found no release.

His body contracted as he spilled his seed into her.

His whole body contracted, and I could see his panic-stricken expression.

His body shortened and contracted, but retained a basic humanoid shape.

Beneath the hospital robe my body swelled and contracted.

Apparently his human body had contracted some malady during his absence.