Shower sex??

I went over to my boyfriends today and we decided to try shower sex and after we got started it was really fun but where I'm 5'7 and my bf is 6'1 it was kinda hard to get around and stuff but after we figured it out it was really sexy and I enjoyed it but I was wonder cause I've heard a lot of people say you have a better chance to get pregnant if you have sex in the shower is that true we didn't use a condom in the shower but he also pulled out I know I can still get pregnant from precum but I just want to know what the odds are