3rd person singular or plural for sentences with fascinar

Question

Hello, I don't understand, why "fascinar" always has to be conjugated in the 3rd person singular or plural, as you have written in the lesson. If I want to say instead of "I am fascinated by Hollywood actresses." the sentence "I am fascinated by you.", I think I have to say "Me fascinas tú." I think, that it's only always in the 3rd person, if it is followed by a verb. And it should be the same with gustar and encantar. Or did I understand something wrong?

Inma Sánchez · Accepted Answer

Hola Frank
You're right. To say you are fascinated by something/someone you can also use "estar fascinado con/por":

Estoy fascinado con esa película.
Está fascinado por Elena.

You can also say:

Le fascina la película.
Le fascinan las películas de terror.
Me fascina Elena.
Me fascina montar a caballo.

This way you use it like "gustar" as in gusta/gustan.
When you're specifically talking about a stronger feeling between two people (generally physical attraction) we can also use the verb agreeing with the person, like in your example: 
Me fascinas tú. ( = tú, subject;  fascinas = verb; a mí = indirect obj pronoun)
We have a lesson on gustar for this but you can also apply it to fascinar. Here's the lesson where you'll see more examples. 
I hope it helps.
Saludos
Inma