no, some sex scenes can be just as erotic if not in detail as in full detail. it depends on how the writer describes the scenes leading up to it..
it takes about 2-3 minutes with my hands fingers, shorter with his mouth, and as soon as his cock slides into my pussy
My naughtiest dare was actually by my boyfriend at that time. We were always finding places to fuck without getting caught. City park by the river, his parents driveway, he finger fucked me under a blanket while with my parents.
But the naughtiest was in his car, in the emergency lane, on a busy interstate, in the middle of the day. I rode him there in the driver's seat, then he pushed me into the back seat and took me there. Finally, he pulled me out of the car, and pushed me over the hood of the car, and took me there.
I cannot speak for everyone on this subject, but i just love it. The first time it happened, I was absolutely shocked. Girls, be careful what you tell your boyfriend.... he might just do it! I told my boyfriend to kiss my ass... and he did. Such an intense thing.