Well, I think there is always a friction between religion and sex among all religions. Not only Islam.
I can completely relate to the above conversation above because I was born in a Roman Catholic family, which is very pious. There is no possible way of having a discussion about sex with your parents/siblings/relatives etc.. The only discussions that I have had about sex have been with friends and with friends only.
I have always been agnostic in my religious views because I have never felt like “Praying to God” or “I should be a good Catholic”. For me, what religions have managed to do is DIVIDE people. It has only brought in inequality among humans.