In the beginning, everything is rosy. You find it adorable how they eat fruit, how they leave their shoes in the hall, or even how they snore. But then comes cohabitation, the famous trial by fire, and suddenly what you found endearing causes you a monumental ick.

The big question in first-year psychology is: is human behavior determined by genetics or context? The answer is, basically, a bit of both, so I've just saved you four years of a degree.

It is one of the most common questions regarding sexuality at a given moment in life. And also one that generates the most pressure. When can we have relations again? As if there were a specific day on the calendar when the body would lift the blinds and say: "That's it, everything is back to how it was before."

The G-spot is a bit like the Holy Grail of sexuality. It's been talked about for decades, and yet it remains surrounded by myths. For many years, we were told that there was a magic spot inside the vagina that allowed women to reach orgasm through penetration. And, honestly, this idea fit very well with a completely coitocentric model, which needed to justify that penetration should be the center of female pleasure.

Whenever I visit a couple with children, I pay attention. Do they have a lock on the bedroom door? It might seem like a strange obsession, but for me, it's a small detail loaded with meaning. Because putting a lock on a door isn't just installing a mechanism; it's setting a boundary and protecting a space of intimacy.

There is a phrase I would like us to stop repeating once and for all: "It's normal for sex to hurt". They have sold it to us in many ways: that the first time is like that, that if you haven't had sex in a while it's normal for it to hurt, that it will pass, that you just need to relax... And, without realizing it, we have ended up assuming that pain is part of sex.

France was one of the first European countries to legalize abortion and where women's liberation was most intensely experienced, especially in the late 1960s and throughout the 1970s, after May '68. But half a century later, its Civil Code continues to establish sexist principles inappropriate for the 21st century, which have resulted in such surreal rulings as the supposed obligation of spouses to have sexual relations.

Japan is experiencing a silent and little-known paradox: it is one of the most technologically advanced societies in the world, but at the same time one of the most refractory to anything related to sex. The latest official surveys indicate that nearly half of Japanese people have not had sexual relations in the last month; this is in addition to the fact that nearly 50% of single young people between the ages of 18 and 35 are still virgins, and that almost one in two marriages survive without having sexual relations. These phenomena worry sociologists, demographers, and even the government itself, since it is part of in a country with a birth rate at historic lows and an unstoppable aging population.