True happiness cannot be maintained as it is only in the moment so the answer to the question is no
Contentment however can and that is not conditional on sex at all as I am both content and celibate
the term “Pleasure”, as classically understood, is more linked to Dopamine, whose activity causes quantum bursts of pleasure
At least that’s what the shrinks used to say. But they were wrong too, I find that it is a quantitative type of pleasure is what dopamine is linked to. As opposed to the other qualitative type of pleasure that we speak of next:
the term happiness, on the other hand, is similar to the term elation and is more linked to Norepinephrine (also look up “anandamide”, which is a part of this Norepinephrine/endocannabinoid-anandamide complex, as one may call it)
Then, they clearly not doing it right.
For men, as well as women, sex as part of an affectionate, trusting relationship, can be extremely rewarding.
Far beyond mere pleasure and well on the way to happiness.
Most healthy people don’t portion out their activities, one to each interpersonal relationship: football with this friend, validation from that one,
playing chess with him, studying with her, jogging with this one, sex with that one…
Physical is just a small part of true intimacy. It has to do with trust and faith. A man that just wants sex will eventually be seen and felt unless the female is an abandoned female.