The man stands, holding his partner in his arms. She wraps he legs round his waist and her arms round his shoulders. She can move against him by pulling herself up and down, and he can help her with his arms. This position can be assumed from sitting. It can, of course, be adopted in a very confined space, but it is quite strenuous. From this position you can return to sitting, or the man can gently lower his partner on to a bed or preferably a table, where thrusting can continue without so much exertion.