There was a study where they claimed that 1 in 8 millenials are virgins. They came to this conclusion by asking 26-year-olds. There are two obvious issues with these results. Firstly, they group both genders together. And secondly, guys lie about not being virgins. The real number is close to 0 of women being virgins. And 40 % of men being virgins.

https://www.telegraph.co.uk/news/2018/05/06/millennials-turned-sex-study-suggests-one-eight-still-virgins/