nope
you can lean more towards males or females
oh and here, just to help you a bit, this scale is called Alfred Kinsey's 7-point Scale of Sexuality
0:
Totally and completely straight. No question about it.
1:
Basically straight. "Technically" straight, but has some occasional thoughts about the same sex. Sometimes.
2:
Bi, but leans a little more towards liking the opposite sex.
3:
Totally perfectly bi; likes both genders perfectly evenly.
4:
Bi, but leans a little more towards the same sex.
5:
Basically homosexual, but still has teh occasional hetero thought/fantasy.
6:
totally homosexual. Would never have a heterosexual thought in their life.