My mom did a great job raising me overall, but I am still sore over how she treated the concept of sex and sexuality all while I was growing up.
She was adamant that her two daughters wouldn't dress like "sluts" and openly referred to other girls my age as such. As a result I tried to hide my body as best I could in grade school. From about 3rd grade to my junior year of high school I was the boyfriendless nerd who came to school wearing an adult men's Tshirt and sweat pants every day. I judged every girl in school who dressed in form fitting clothes as immoral whores who I shouldn't associate with. Meanwhile, my mom regularly referred to me as a prude when I became uncomfortable at a sex scene in a movie or when adults talked about sex. I got a lot of mixed signals like this all throughout my teen years.
Because of this fear of sex and sexuality, I didn't have sex until I was 18, even though I had maintained a long term relationship with the same guy since age 14. I was just too afraid of looking like a "slut" to do anything like that with him, and when I finally did I was absolutely wracked with guilt. I hid the truth from my mother until i was about 22 and she couldn't understand why I was so worked up about confessing that I was sexually active. Through high school I stayed with this same person (our relationship wound up lasting around 8 years), even though he was very mentally and emotionally abusive.. again, because I was afraid of looking like one of those "sluts" who just swaps out boyfriend after boyfriend. I was also preached the concept of "unconditional love" by my mother (which is a really fucking twisted concept when you think about it) and that played a huge part of why I stayed with my abusive SO for so long.
Fast forward several years. I found myself in a polyamorous relationship with my then boyfriend and a new guy (who is the current love of my life). This person treated me in a way that no man had treated me before. He respected me, treasured me, made me feel like his princess. We were, and still are, madly and stupidly in love. I was living with my mom when he and I started dating (she was aware of the poly relationship and none too approving of it. She made it clear that she did not want me having sex with my new partner under her roof). So against my mother's wishes, I had my boyfriend over one day, and we had sex for the first time. For the next day or so my mom was acting very strangely (she and I worked in the same department, and her silent treatment was becoming rather noticeable). She decided to confront me at work, while I was on the clock, and tell me that she had gone snooping through my sock drawer and found a box of condoms. She was absolutely livid and shamed me at work for having sex with my boyfriend (keep in mind, I was 24 at the time... I.e., a grown adult). Needless to say I felt like absolute garbage. I was humiliated and ashamed. She never had a problem with me having sex with my other partner in the house, and she didn't seem to voice any disapproval with my younger sister, who regularly fucked her FWB and made no effort to hide that fact (mom used to comment how they would keep her up at night).
I don't know why my mother felt such a need to police my sexuality, but its something that still bothers me to this day. I grew up hating and fearing my body and my natural urges because of her.