in my experience the positions that are deepest are doggystyle with womans ass up and her face down in the bed is great and missionary with you standing and her on the bed with you spreading her legs wide as they can as you fuck her brains out, that drives them CRAZY!!!!
FYI MAKE SURE YOU ARE STANDING AND SHE IS LAYING AT THE EDGE OF THE BED, WHEN IN THE DOGGY, GRAB HER ARMS AND PULL HER TO YOU AS YOU ARE FUCKING HER AND IN THE MISSIONARY, RUB HER CLIT WHILE YOU ARE FUCKING HER, WORKS EVERYTIME
FYI2 FOR EXTRA TRACTION KEEP YOUR SHOES ON, LOL, DONT KNOCK IT TIL YOU TRY IT, YOU CAN DIG REAL DEEP WHEN YOU DONT GOTTA WORRY ABOUT SLIPPING
FYI3 IT ONLY WORKS THE BEST IF YOU HAVE A BIG DICK, OF COURSE LOL