"After the Pill was introduced in the mid-1960s, fornication and 'shacking up' both almost doubled in a period of only five years. This behavior also increased steeply when abor-tion was legalized in 1973. People of all ages (but especially teenagers) are fornicating more than ever before. Wife-swapping clubs, sex addiction treatment organizations, hard-core pornography, and 'fantasy [[w:Sex tour|[sex] tours]]' to Far East nations have increased tremendously. Even the original developers of the birth control pill now acknowledge that their invention has led to widespread promiscuity. Dr. Robert Kirstner of Harvard Medical School said that "For years I thought the pill would not lead to promiscuity, but I've changed my mind. I think it probably has." And Dr. [w:Min-Chueh Chang| Min-Chueh Chang]], one of the co-developers of the birth control pill, has acknowledged that "[Young people] indulge in too much sexual activity ... I personally feel the pill has rather spoiled young people. It's made them more permissive." Dr. Alan Guttmacher, former director of the International Planned Parenthood Federation, also drew a clear picture of the connection between abortion and contraception within the context of increased promiscuity; "When an abortion is easily obtainable, contraception is neither actively nor diligently used. If we had abortion on demand, there would be no reward for the woman who practiced effective contraception. Abortion on demand relieves the husband of all possible responsibility; he simply becomes a coital animal." Finally, psychologists Eugene Sandburg and Ralph Jacobs noted the obvious connection between contraception and abortion as birth control; "As legal abortion has become increasingly available, it has become evident that some women are now intentionally using abortion as a substitute for contraception." Dr. Min-Chueh's quote, above, showed that he was certainly correct in his assessment of the situation. In 1970, only 4.6 percent of all girls aged 15 had fornicated before marriage. In 1990, this rate had increased more than sevenfold to 33.1 percent. Of all unmarried girls in the 15 to 19 age bracket, 28.6 percent had fornicated in 1970. This rate had more than doubled to 61.4 percent by 1990."