Is it normal that i giggle when i’m around any man my age?

I come from an all-girls school so was never around too many boys in my life. I’m 18 now and have been working in a shop for a little over two years. When I started I was very giggly around my male coworkers and assumed that I was just attracted to them as a horny teen or whatever. It’s been two years and nothing’s changed. I just go all giggly with men I have never and will never be attracted to, and even with men that I can’t stand to be around. I’m bi but I don’t find myself turning all giggly when I’m around women that I’m attracted to. Is this normal? Any time I check on Google it tells me that giggling is a sign of attraction or nervousness, but I’ll act like it with even my closest male friends