Must sexual attraction occur immediately or can it develop over time?

What do you think about this issue? Yesterday we were meeting friends and somehow the question came up. The majority claimed that it must be immediately or will never come. I’m among the few who believed that it could come with time and the more we know who is in front of us and his inner soul, then the crush may come and we fall in love with that person.

Do you believe it or think like the majority?

I found out that I may like a lot of different kinds of women with completely different appearance. There are women that it happens immediately when I look at them but others it can take several weeks and months, but it can happen.