"Sex Life" is a term used to describe the occurances and nature of one's sexual practices. For example, if someone spends their weekends endulging in frenzies of sexual euphoria they have an 'active' sex life whereas someone who stays home doing puzzles with their grandma has a 'drab sack sex life'
Gabby: "I'm used to having a pretty active sex life"
Hank: "Me too. Let's get it on!"