Regarding your questions: by holiness in our Bahá'í teachings is meant attachment to God, His Precepts and His Will. We are not ascetics in any sense of the word. On the contrary, Bahá'u'lláh says God has created all the good things in the world for us to enjoy and partake of. But we must not become attached to them and put them before the spiritual things. Chastity in the strict sense means not to have sexual intercourse, or sexual intimacies, before marriage. In the general sense it means not to be licentious. This does not mean we Bahá'ís believe sexual relations to be impure or wrong. On the contrary they are natural and should be considered one of God's many blessings. He does not know anything about whether albumen and delicious food affect sex; this is a medical question. Sex is a very individual matter, some people are more passionate by nature than others, and might consequently suffer more if forced to be continent. But when the world becomes more spiritual there will not be such an exaggerated emphasis on sex, as there is today, and consequently it will be easier for young people to be chaste and control their passions. A man of noble character and strong willpower, could certainly remain faithful to his wife during a long absence!
Any good orientalist could probably refer you to commentaries on the Qur'án and on the Buddhist Scriptures. `Abdu'l-Bahá has stated that all references of Muhammad to fighting refer to defensive war, not to aggression.