With the penis inside the woman's vagina, the man can control the force, depth, and rhythm of thrusts, and can also control to some extent the female partner's movements. Subject to the man's weight and position, the woman may have some control by pushing her feet and legs against the mattress and by side movements in her pelvis as well as by clutching onto and moving with her partner. A woman can increase the force of a man's thrust by moving against the man's rhythm.