I think it also depends on the age of the other party, as well, doesn’t it?
Apparently yes as of 2003.
This site:
http://www.cga.ct.gov/2003/olrdata/jud/rpt/2003-R-0376.htm
says for Hawaii:
“First-degree sexual assault to knowingly engage in sexual penetration (1) with someone under age 14 or (2) with someone between age 14 and 16 when the offender is more than five years older.”
Whether there was an age difference in the early 1960s and whether the age was 16 or 14 is hard to know. I think it would have been unusual for the age to have been 18 in the early 1960s.