Ok this is bit of a long post. There was a book by Naomi Wolfe about childbirth that mentioned her meeting a midwife who referred olive oil to pregnant women and hardly ever had women tear so yes I think the massage thing can't hurt.
I had a wonderful water birth, felt very relaxed but I still had a massive PPH and an extremely bad tear, was stitched in surgery and suffered major blood loss but just got away with a transfusion - I think partly because they couldn't really measure how much blood I had lost because of the water.
I healed remarkably well. I did have issues with some initial incontinences and when I need to go to the loo I sometimes need to go fast but I'm all fine and it took months before I could every feel like I could go running for example.
I got to speak things through with a consultant and a group of students (who I got to see at hospital because I was in the High dependency unit) who was experienced but also said that there was not research out there as to reasons for tearing. Some people thought water births could mean some risk of increased tearing, and some people felt that Midwives may not be able to guide when to push in a water birth but then that seemed conjecture to this consultant and it could not really be proven.
I did have an extremely quick labour so I'm not sure if that had something to do with it? I also asked if it was to happen again - but the consultant didn't believe there was any reason in my case that it might or might not happen again.
The hospital I went to were brilliant I got to talk through the birth with someone 8 weeks afterwards which involved going through my notes seeing how I'd healed. To be honest because I had really great care although everything was explained to me and I knew it was all very serious I never ever felt worried. I do remember being white as a ghost for a few days though and the first time I looked in the mirror thinking by gosh why has all the colour drained from me! I also had a midwife who wouldn't let me have my first shower alone and asked my husband to take me - which was just as well as I kind of nearly collapsed. I do feel very incredibly lucky and blessed that things eventually healed up well and my baby was so well.
I've met women who have really beaten themselves up due to a traumatic labour - but I still see my birth as this kind of great positive wonderful experience - with a massive endorphin rush at the end?