When I was in the army and stationed in Aden, along with three other soldiers I had two weeks' leave in Kenya. We stayed with an ex-patriate widow whom we met after a 150 mile journey in a Peugeot 403 taxi from Nairobi to her homestead within sight of Mount Kenya. We introduced ourselves, another of the four saying, "Hullo , I'm Johnny Xxx". Quite innocently, the aged widow replied, "Oh, you don't look like a Johnny to me". We all kept straight faces.
As for what we called contraceptives, it was usually FLs - french letters. The only time we saw the word 'condom' might have been on a packet of them, or on the boxes of 100 that were issued to married personnel. Unlike the usual oiled Durex FLs, the 'Contraceptives, Married Personnel for the use of, 100' came in a cardboard box and were coated in a chalky powder to stop them sticking together. Very sexy, very romantic. A staff-sergeant in my unit once asked me to collect his issue on his behalf.
Soldiers also slipped one over the muzzle of a rifle barrel to keep the bore free of sand, mud, etc - mainly in amphibious landings, but instantly ready for firing.