I've always found it really strange when parents pressure their children for grandchildren. I find it even stranger when the parents live all the way across the country. Like they'll see their grandchildren, what, a couple of times a year. What about what their child wants? When does the child's wants become important? Why is having grandchildren so important that they have to pressure their child into a sexual relationship? I like what RightGalaxy said above,"The people pressuring you could die tomorrow and then you'd be stuck in a life you never wanted in the first place."
I wonder, when a grown child is pressured for grandchildren, can the grown child suggest that his or parents adopt a baby? Or get a puppy, or a hobby? Or join a social club or civic club? Is that a rude thing to suggest to your parents? I don't know. In my mind's eye, I see a young woman listening to her parents beg her for grandchildren, and she pulls pamphlets out of her purse and explains about a Lions Club and a Chamber of Commerce and a knitting or crocheting club, poker tournaments, etc. I laugh when I think about that. I'm not laughing at your parents at all, so if you're offended, I'm really sorry. I'm on your side.
You're fine if you're asexual, i.e., not attracted to either sex.
You're fine if you don't want to have sex for any reason you choose. It's your body, nobody else has a right to decide that you should have sex if you don't want to. Besides, I think it's been a trend for about 10 or 15 years for a person to be MUCH more concerned with someone else's sex life rather than their own. It's kind of an obsession among NTs, I daresay it's a mental illness, but maybe that's just my bias against social trends speaking here. They go farther than that often, by rubbernecking your answers to whatever nosy questions they're asking.
Some people are uncomfortable with sex for a host of reasons. If it bothers you that you are uncomfortable, people might suggest you explore the reason you are uncomfortable. But if it doesn't bother you, and you don't focus on it, then it starts to get weird when other people obsess about your sex life or lack thereof. Girl, you are living a life that's a little less complicated, and I applaud you for it. You got a lot less baggage. You spend way less money or none at all on birth control and tests and shots. You don't cry yourself to sleep when some jerk doesn't call you back.
Personally, I don't find the idea of parenthood appealing. My life is complicated enough as it is without inviting another responsibility into my life, especially one as all-encompassing as raising a child. My sister gave my parents their grandkids. I gave them grandkitties.