I had mmr vaccination as a child in the correct immunization sequence. do most people get mmr again as an adult? i had an adult mmr as well, but i'm curious if that is the norm to get it again as an adult?

People who cannot demonstrate immunization may be re-immunized, as do people who have had bone marrow transplants. One might receive MMR if there is a question of having useful protection. Sometimes people receive another MMR if the first two were too close together. Usually immunity from the childhood immunizations is quite good and a subsequent booster unnecessary

You likely only received one MMR given your age, by the 1990's we started giving 2 at least a month apart to bring the protected rate from 80-95%. You may or may not be at risk and a dose now would not hurt. Many OBGYNS test rubella immunity for those interested in pregnancy because it is such a devastating disease on the fetus.