Rachel Bilson joined the podcast and had a very raw conversation about sex.The 41-year-old actress didn't hold back when the topic of sex came up, and she told co-hosts Roxy Manning and Tammin Sursok that she found one sure way to experience an orgasm while having sex. «I like missionary,» she said. «I've learned that if you want to have an orgasm during sex, you have to be on top.» star didn't end there in divulging her preferences when it comes to sex.«But missionary is my favorite,» she added.