Intercrural Sex?

As a writer of fiction, I am working on a story that draws from my sexual experiences as a teen during the 1960s. My girlfriend of three years and I refrained from sexual intercourse or any hand stimulation of each other, and remained fully clothed during lovemaking that led to orgasms in my BVDs. The street description of what we practiced was laughingly called “dry humping.” Perhaps you can understand why she and I, and my male friends, never admitted to what did for relief of sexual tension. Question: Was our practice unusual in terms of adolescent sexual development? And how does it differ in from the term “intercrural sex”? Are the terms interchangeable? Are either in prevalent practice today? My gratitude for your attention—and for not smirking.