When I lived in the remote north west coast of western australia I joined a small group and we cycled every wednesday about 5 miles to point samson and back. The way out to the point was good because it was a tailwind but coming home was murder. I was the newbie in the group and one female who rode with us could see me falling back. She called to me say that I should fall in behind her and ride as close as I could. She had a nice booty and I had no problem keeping up with the pace from that point onwards.