Sex 38weeks+

How on earth and what position do people do when having sex past this time? 
It feels like going to the gym... And my husband can't get over the fact the baby is big and ready to come out.. 
Happened with my first pregnancy and the same again this time. 
I see people saying they're still having crazy sex up to d day? I can just about roll off the bed like a whale let alone have intimate times with my husband...