It sure wasn't her ex-bf during their high school years. He only knew the missionary and dogie positions, and was only good for the one shot.
After they broke up there were a few others in between before I met her. She said they were brief flings or one night stands. The most notable was an older man who she met on a blind date arranged by one of her girl friends. He charmed the pants off her and put her through her paces from the evening to the next morning. That's when she found out she was multi orgasmic when he had her over and over again. I believe he taught her a few things or two on that date.
We were together for a few years before we got married. I got her anal cherry and introduced her to sex toys among other things. The rest was history.