I'm sorry if this was of no help because I just realized that you mentioned "taste" only and not smell.
I have noticed the oniony smell from down there as well. I know it is not internal. It happens when I sweat and smells like an armpit when it sweats. This has been happening to me for about 10 years now. I'm not a big onion eater, nor am I on birth control. I also notice that it's happens more when it's a nervous sweat rather than sweat from physical activity which definitely makes me think it's hormonal.
What I do for the problem, and works well for me is first keeping the area shaved. Then, after a shower and drying off, I use a feminine deodorant spray. There are different brands, but I've found FDS to be the best for me. This actually does prevent the onion smell. You do have to use it daily for best results. It's just like using regular deodorant for your armpits.
As for the nipples, I don't have that problem. Maybe your nipples sweat and produce the same odor/taste. I don't know if FDS would be good for that area and probably would not be a good taste in someone's mouth so you would probably just have to wash your nipples more often than most people.
I hope this advice works for you because believe me I know how frustrating it can be. Good luck and let me know if you try this and wether or not it worked for you.
Hello Claudia.
I’m going to answer your question even though this forum is for questions about erection concerns.
I can’t tell you for sure what’s going on—merely give you some possibilities. Vaginal smells and tastes aren’t related to pheromones, etc. And your breasts and vagina don’t have the same glands. In fact, why your breast would smell and taste like an onion is a mystery to me.
However, various factors CAN affect the smell and taste of your vaginal lubrication. One obvious factor is the form of contraception you use, since some forms can affect your bodily chemistry. Therefore, you might experiment with various contraceptives to see if your smell changes.
And it’s also possible that the “onion” smell is merely the way your body responds to semen. Semen is an alkaline substance and can change your vaginal chemistry, thus affecting the smell and taste. It’s also possible that your boyfriend isn’t comfortable with your natural smell. Many people grow up with the idea that there is something ugly, dirty or wrong with the female crotch, and these attitudes are difficult to change.
Your vagina is a self-cleaning organ, and, in fact, there are less bacteria in it than there are in your mouth. Like other parts of our bodies, it produces fluids, and can also get quite sweaty during lots of exercise, so it's important to keep it clean. It's possible that the physical exertion involved in being sexual changes your smell, and your boyfriend may not have been used to that smell--just like when you sweat and your armpits smell. So keep it clean. However, there are helpful bacteria that live in your vagina, so you should NEVER wash it with anything that has perfume or alcohol. Plain water only, please.
Also note that your food intake can affect your vaginal odors. Intense, spicy foods such as garlic change the odor of vagina secretions as well as semen, so if you eat a spicy diet, expect your odor to change accordingly.
The vaginal environment can also be affected by an infection like bacterial vaginosis or a yeast infection, or to an STI, like gonorrhea, trichomoniasis or chlamydia. In addition, any itching, burning, pain or discomfort -- during urination, sexual activity, or just in daily life -- are also signs of an infection. Some vaginal infections are sexually transmitted via manual, oral, vaginal sex (or anal sex, if vaginal sex was also had with the same condom or with no condom), and that transmission is not limited to heterosexual activity: others develop without having had any partnered or solo sex whatsoever.
If you suspect an infection, see your gynecologist immediately.
For more information about this issue, I'd recommend you check out www.scarleteen.com. Good luck. Dr. J