"I grew up with a lot of boys. I probably have a lot of testosterone for a woman"

In this quote, Cameron Diaz is reviewing her youth and the environment she was raised in. She mentions maturing with a lot of boys, which recommends that she was surrounded by male influences and perhaps had more male pals than female friends. By mentioning that she probably has a lot of testosterone for a lady, Diaz is acknowledging that her upbringing may have had an influence on her character and behavior. Testosterone is a hormone normally related to masculinity and is often connected to qualities such as hostility and competitiveness. Therefore, Diaz is indicating that her experiences with kids may have influenced her to have more traditionally manly traits, despite the fact that she is a female.