Weirdest shower sex

So me and my bf decided to get frisky in the shower…it was all going well, i got on my knees and started giving him a blowjob. He was massaging my hair as i was doing it and then it got weird… he began to wash my hair with shampoo whilst I was giving him head. He literally washed me as I was down on him and was thinking tf is going on but just carried on and once i finished him i just rinsed my hair and we got out the shower. Till this day i just find it hilarious and the fact that it turned him on to wash me lmao