I did it aged 17 without lube and was a little painful... But I enjoyed it enough to want to try again. So after purchasing some lube (I'm so proud to be able to buy things like that with a big grin and no blush) we tried again a couple of times and very little pain for me and I enjoyed it quite a lot too. However, I think maybe I enjoyed it more than my OH, so he's never really been interested in it.