That is why anal play is much more acceptable today than it was a decade ago. A few years back, it was considered taboo, but today, both men and women are immersing themselves with fun stuff involving the bum. And, the adult toy industry has made the job so much easier. The prostate is basically an organ below the bladder. The purpose of the prostate is to create an alkaline substance that creates the greater part of semen during ejaculation.