Is it normal to feel turned on by a childhood friend

Yes, if you known someone that long sure it's bound to make you have feelings for them, just be careful that this doesn't turn into a one of you seeing one or the other as just a brother or sister cause that can happen.

Sure.

Just take his taste.

As mentioned above, it's pretty normal for romantic feelings and sexual interest for an childhood friend to arise. You've known them for so long and have always been close to them. But also as mentioned above, be careful as there is a chance of them seeing you as more of a sibling (blood relatives don't always equal family). But just remember, if you're within their sexual preference (if they're bi/gay/straight), then just ask them how they see the relationship between you two. If they don't see you as a sibling, then come up with a way of telling them your feelings. Yes, I know that you said that you get turned on by them, but this can also go for if you do develop romantic feelings for them.

And just a little extra...

You're post is very normal and is truly a breath of fresh air when compared to how this site is mostly overrun with incestuous posts or the "straight but had gay sex" posts, or any of the troll posts.

Thanks for the relief from all of those kinds of posts.
Sincerely,
chickennuggets