I have had a lot of conversations with women about vaginal orgasms. A vaginally activated orgasm is one that takes place inside (as opposed to the clitorally activated orgasm) due to stimulation of the G-Spot.
I do not know any women who have described having an orgasm in this way without concurrent clitoral stimulation. I was deeply saddened when a young woman, 19 years old, admitted she had not had sex in over a year because she thought she was abnormal due to her not being able to climax without clitoral stimulation. I was happy to tell her that she was perfectly normal and every woman I knew needed clitoral stimulation in order to have an orgasm.
According to Kilchevsky, Vardi, Lowenstein, and Gruenwald (2012), the existence of an anatomical G-Spot is controversial. Unlike the clitoris, which can be identified, there is no distinct organ that can be called a G-Spot (Jannini, Buisson, & Rubio-Casillas, 2014; Puppo and Guenwald, 2012). However, some women swear it exists.
So what is with the discrepancy? Researchers claim that this is due to anatomical differences between women. Ultrasound scans showed that there were differences between women who claimed to have vaginal orgasms and those who do not; in the women with the anatomy that allows for vaginal orgasm, appropriate stimulation of the clitourethrovaginal (CUV) complex (a term proposed to take the place of the name G-Spot) may lead to orgasm (Jannini et al., 2014). This might explain why, despite there being no obvious G-Spot, some women report having vaginal orgasms.
Elisabeth Lloyd (2005), a professor at the University of Indiana and author of the book The Case of the Female Orgasm: Bias in the Science of Evolution, states that only 20-25% percent of women experience vaginal orgasms.
When considering these statistics along with the findings from from Jannini et al., it is easy to see why so many women say they need clitoral stimulation in order to achieve orgasm. So ladies, if you require clitoral stimulation in order to bust a lady nut, you are normal and everything is alright.
Jannini, E. A., Buisson, O., & Rubio-Casillas, A. (2014). Beyond the G-spot: Clitourethrovaginal complex anatomy in female orgasm. Urology, 11(9), 531-538. doi:10.1038/nrurol.2014.193
Kilchevsky, A., Vardi, Y., Lowenstein, L., & Gruenwald, I. (2012). Is the female G-spot truly a distinct anatomic entity? Journal of Sexual Medicine, 9(3), 719-726. doi: 10.1111/j.1743-6109.2011.02623.x
Lloyd, E. A. (2005). The case of the female orgasm: Bias in the science of evolution. Cambridge, MA: Harvard University Press.
Puppo, V., & Gruenwald, I. (2012). Does the G-spot exist? A review of the current literature. International Urogynecology Journal, 23(12), 1665-1669. doi:10.1007/s00192-012-1831-y