Sexual situations add one important condition: participation still has to be genuinely voluntary.
Research on sexual motivation helps illustrate the difference. In a series of studies, couples reported the reasons they had sex. Motivations such as seeking closeness, pleasure or expressing love were associated with more favourable satisfaction outcomes, whereas having sex mainly to avoid a negative reaction — for example, to stop a partner from becoming upset — was associated with poorer outcomes. These are associations, and real motives are often mixed, but the distinction is still useful.
The same “Okay, let’s do it” can therefore describe very different experiences.
One version is: “I wouldn’t have suggested this myself, but I’m curious to try it with you.”
Another is: “I don’t want to, but I know you’ll be upset for two days if I say no.”
Both may sound like agreement from the outside. Internally, they are very different experiences.
A useful conversation about sexual differences is less about designing a perfectly fair rotation of desires and more about being able to state the full range honestly: “yes,” “no,” “I’m interested under certain conditions,” “not now,” “I like the fantasy but not the practice.”
The differences may remain. But neither person has to choose between their boundaries and peace in the relationship.