Oral sex advice!?

So me and my boyfriend are going to try the 69 for the first time.. I've given him alot of bjs before but this would be our first time of him eating me out lmao. Well I'm very conscious about my vagina. I dunno if it'll turn him off or what. And i just don't want him to be repelled by it. I have noticed that i kinda smell really intense when I'm all turned on is it normal? Do guys find it okay if we smell down there? Not a bad kind of smell its just a really strong one i don't know how to really describe it. Also I haven't actually ever let him see me down there too cause well I'm not exactly like all those porn stars out there :( any advice? do you guys really enjoy it? Your experiences would be really helpful too.