@heartofaboy
back in my day the unwritten "rule" about courting in the troof was---no sexual intercourse. i know several of my peers who engaged in heavy petting-as indeed we did. it was only at a big assembly in the UK--in 1968--we were on our honeymoon---there was a major talk--and a drama--about premarital "fooling around". red faces time.
i know many jw marriages that failed in the early years--but to be honest--probably no more than average.