One need to understand what is meant by :
Sex, that becomes ‘the seed’
Love, that becomes ‘the flower’, and
Compassion, that becomes ‘the fragrance’, of one’s journey towards knowing the self or consciousness or answer of ‘Who am i?’ and knowing it means ‘entering the kingdom of God’ for Christians or Krishna/Buddha consciousness for Hindus/Buddhists etc etc.
Each word of great masters is worth a lot lot weight behind it. So one’a inability to understand it may result in understanding wrong message.
Sex is lowest form of Love, it is passion or love limited to the body. Still it has a glimpse of beyond body experience at orgasm. If both persons engage with totality and to give other the best one can give using whole body arousal then either both will reach to their orgasm together or it may last upto 20+ minutes or both can happen simultaneously. Then one can, for first time, experience of beyond body or being. For a moment mind and body vanishes and pure bliss remains. In bodily love if it is not experienced in whole life even once, then passion overpowers to make life a hell. This is Tantra developed by Tilopa, Milarepa etc in Tibet.
It is called seed because only with this total orgasm experience begins the journey of Tantra meditation, which is best way for liberation in today’s time as per Osho.
Next level of Love is of mind. That is described here too as love. When a person finds himself or herself at peace in presence of another person or at a place like temple/Church etc. It is called flower of the journey because it lasts for much longer duration to embrace its beauty. It takes one deeper into his/her heart. Here if attachment or possessiveness overpowers then it may become a prison. This is why Osho preferred that both partners need to give full freedom to each other. In many cases these experiences may require different partners.
This level of Love is love of souls. Here both gets dissolved to become one, soul itself-since it is same for everyone/everything. Only soul remains and ‘seen’ by both in the moment. Osho experienced it at the age of 9 yrs with Shabhu Babu Dubey-as per Swarnim bachpan, his book. Here still need of other is there so one need to take one more step.
This experience brings one beyond passion and attachment into compassion and then without any other’s help one is able to ‘see’ his/her self or soul or consciousness or existence or emptiness for first time. Now no one can take it away from you, not even body’s your death. Effortlessly it happens and called as Wu-Wei-Wu in China/Taoism or ‘Satori’ in Japanese Zen. It spreads in your whole body immediately and you are no more the same person. Now onwards everyone or everything that comes in contact with you gets benefitted by it automatically and even you cannot stop it – just like fragrance of a flower. Whole existence will get benefitted by it, may be felt locally only.
Then there is still another step called as ‘the fourth’ or ‘turiya’ or ‘surati’. Here one attains a state of effortless compassion 24×7 and sound of Omkar starts ringing itself into body for 24×7.