Singing With A Sucking Throat?

My throats keeps sucking in when singing. Heard that it is the wrong technique. I did make some research about. It said that singing are supposed be the same way as how you usually talk. And yes, i do talk and realized that my throat do suck in at certain vowels in a relax way. What do you think?? Currently, I don't have much problem in singing. I sing through thinking of the notes in mind. But is there any side-effects? What could I do? It's just that i'm comfortable to the way I am now.