Is sex the answer to your relationship woes?

Michele Weiner-Davis, the marriage-guidance counsellor, explains why she thinks having sex – even if you don’t feel like it – is the foundation of a happy relationship

To be happier, women should try giving up on being good

Women are more unhappy than men, and men are blamed for this. But perhaps men aren’t the real culprits

Viagra: the little blue pill that revolutionised our sex lives

The virility drug, soon to be available over the counter in the UK, is a phenomenal success story, despite being the butt of many jokes. In 25 years, it’s also changed how we talk about male impotence

My problem with Viagra? It feeds men’s obsession with macho performance

I’m all for the erectile dysfunction drug being available over the counter. But this doesn’t mean women have to tolerate men’s fantasy-driven sex antics, writes Guardian columnist Deborah Orr

My wife refuses to have sex following the traumatic birth of our second child

I try to be understanding, but after 18 months of her refusing to even talk about sex, I’m feeling downhearted

Can too little sleep ruin your relationship?

Lack of shut-eye has long been linked to a range of serious health problems. Now a study confirms that it can also be at the root of strife between couples