I'm male, 20, and going to university in the USA. My family is of Indian heritage, but lives in the U.S. They pay for most of my tuition and housing costs. In my particular cultural segment, it's considered bad to get a job while studying, as it distracts from coursework; you "repay" by getting good grades.
First of all, it's worth mentioning that in my culture, even after one becomes a legal adult, they are still considered a member of the family and the "child" of the parents until they are fully settled (e.g. in a salaried job, married, etc.).
After a long time of considering my overall feelings, I've realized that I'm an aromantic asexual, meaning that I do not experience sexual or romantic feelings towards others in the same manner as those of other orientations. I do not experience any desire to date or be in a sexual or romantic relationship with anyone.
This year, I've lived with a roommate that frequently invited other men over; they'd play video games loudly and frequently yell out expletives and misogynistic comments. I find such comments personally offensive, and am (unfortunately) quite hesitant to stop people from making such comments, for fear of being perceived negatively and sort of as a result of my autism spectrum disorder (irrelevant to this question).
Therefore, for this upcoming school year, I made the decision to stay in a co-ed living arrangement. I feel like this is the best choice for me because I feel like I will get along much better with my housemates if I'm in a mixed living situation, and I feel very uncomfortable with the various things that are bound to get uttered if I'm in an all-male living situation (but my perspective could just be slanted).
The problem is, as I'm still expected to share certain details about my life with my parents, I'm a little scared that they'll get mad if I just tell them that I'm in a mixed living situation, and might even take actions to get me away from it. They told me in an unrelated context that I should not be living with any females; I naïvely asked why, and they told me that they are "dirty". (I didn't prod them on any further.) I really don't believe that that is the real reason, and while I did vaguely tell them I don't have much of a desire to date or be in a relationship, I'm sure that they will freak out if they realize that I'm in a mixed living situation because of "sexual" reasons.
How can I convey to my parents that I'm signed up for a co-ed apartment next year and do not intend to change my living plans, and reduce the chances that they will get mad at me or start taking actions against the arrangement?
Update: Due to complicated reasons beyond my control, I've been moved into a single-gender apartment. Thanks for the great answers; I'm still leaving this open in case others want to answer this in case someone else has the same question.