without guilt or jealousy." One popular hippie slogan that appeared was "If it feels good, do it!" which for many meant "you are free to love whomever you please, whenever you please, however you please". This encouraged spontaneous sexual activity and experimentation. Group sex, public sex, homosexuality; under the influence of drugs, all the taboos went out the window. This doesn't mean that straight sex or monogamy were unknown, quite the contrary. Nevertheless, the open relationship became an accepted part of the hippie lifestyle. This meant that you might have a primary relationship with one person, but if another attracted you, you could explore that relationship without rancor or jealousy." Hippies embraced the old slogan of free love of the radical social reformers of other eras; it was accordingly observed that "Free love made the whole love, marriage, sex, baby package obsolete. Love was no longer limited to one person, you could love anyone you chose. In fact love was something you shared with everyone, not just your sex partners. Love exists to be shared freely. We also discovered the more you share, the more you get! So why reserve your love for a select few? This profound truth was one of the great hippie revelations." Sexual experimentation alongside psychedelics also occurred, due to the perception of their being uninhibitors. Others explored the spiritual aspects of sex. Travel Hippies tended to travel light, and could pick up and go wherever the action was at any time. Whether at a "love-in" on Mount Tamalpais near San Francisco, a demonstration against the Vietnam War in Berkeley, or one of Ken Kesey's "Acid Tests", if the "vibe" was not right and a change of scene was desired, hippies were mobile at a moment's notice. Planning was eschewed, as hippies were happy to put a few clothes in a backpack, stick out their thumbs and hitchhike anywhere. Hippies seldom worried whether they had money, hotel reservations or any of the other standard accoutrements of travel. Hippie households welcomed overnight guests on an impromptu basis, and the reciprocal nature of the lifestyle permitted greater freedom of movement. People generally cooperated to meet each other's needs in ways that became less common after the early 1970s. This way of life is still seen among Rainbow Family groups, new age travellers and New Zealand's housetruckers. A derivative of this free-flow style of travel were the hippie trucks