The spelling of the word "haddest sexual relations" follows the rules of English language pronunciation. It is pronounced as "hædəst ˈsɛksjuəl rɪˈleɪʃənz", with the stress on the second syllable of "sexual" and the last syllable of "relations". The use of the archaic word "haddest" instead of "had" indicates a past tense form of "have". The phrase describes the act of sexual intimacy, but the use of the antiquated language and grammar suggests a time period or setting where such language was more commonly used.