There is no specific target number or 'dose' for sexual activity, as individual and couple needs vary.

“But I also don't believe that. Every person, every couple is different. When you look at couples, um I like to look at sort of who's having sex and by what frequency. Um, and so about 20% of couples, and this is ages 30 to 60, about 20% of couples are having sex twice a week or more. About 10% of couples are what we call never having sex. And that means in the last year and about 70% of couples are having sex between those, meaning once a month, twice a month, sort of around that number.”