Hope I don't get banned for this! On the slang topic. I can remember some sex related 1970 school playground terms, which you don't hear any more.
'having it up' - the sexual act
'on bonk' - an erection
'mo' - homosexual
'browner' - homosexual
'rubber johnny' - condom
'dolly bag' - condom (although can't find any mention of this in any online slang dictionaries, which all state it is a docker's secret pocket, so I might have imagined this one)