How to Say "sexually" in Spanish
The Spanish word for “sexually” is “sexualmente” — B1 level.

Examples
Ella se siente atraída por él sexualmente.
She is sexually attracted to him.
Hay muchas enfermedades que se transmiten sexualmente.
There are many diseases that are sexually transmitted.
Es necesario educar a los jóvenes para que se cuiden sexualmente.
It is necessary to educate young people so they take care of themselves sexually.
The '-mente' Ending
In Spanish, adding '-mente' to an adjective is just like adding '-ly' in English. It turns a describing word into an action-describing word (an adverb).
One Form Fits All
Unlike adjectives, words ending in '-mente' like 'sexualmente' never change. You don't have to worry about whether you're talking about a man or a woman; the word stays the same.
Misplacing the Word
Mistake: “Using 'sexual' when you mean 'sexualmente'.”
Correction: Use 'sexual' to describe a thing (e.g., 'orientación sexual'), but use 'sexualmente' to describe how someone feels or acts (e.g., 'atraído sexualmente').
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