not know exactly how to start, we made a mistake , by me forcing her on all fours and than pushing my cock which she guided to her anus area. It was a painful experience as she would not relax and the anus area is quite dry, so penetration is not as easy possible as with vaginal or oral sex. Next we proceeded to apply some lub (baby oil) and a small difference it did make. However penetration was limited to the head of my cock and sensations created because of the tightness