Prostate Exam Questions

I haven’t been feeling well so today I went to the ER at Ben Taub. The doctor checked me out and told me that while I was there I should go ahead and get a prostate exam. He told me to drop my pants and bend over. I’m just curious what machine they do this with. Someone told me that they use their finger, but when he was behind me, both of his hands were on my shoulders. Also, is it normal for the actual exam to last 22 minutes?