This is the 16609th most frequent Russian word.
сексе
"Сексе" is not a standalone Russian word; it may be part of a phrase or context referring to "sex" in transliteration.
In this sentence, 'сексе' is used as a prepositional case of the noun 'секс', indicating the topic of conversation.
Она говорит о сексе открыто.
She talks openly about sex.
Here, 'сексе' is also in the prepositional case, referring to the subject the advice pertains to.
Книга содержит советы о сексе.
The book contains advice about sex.
Once again, 'сексе' appears in the prepositional case, showing the theme of the discussion.