Sowing

In Serbia in the past people lived in extended families called "zadruga". When grain needed to be sown, the family would choose one man to do all the sowing. He had to abstain from sex from that moment until all the seeds were sown. 

Sowing (spreading of seeds) is here directly linked with ejaculation (spreading of semen). Male reproductive energy which is usually used to impregnate a woman has to be during sowing period preserved and used to impregnate the Earth...