Tomorrow!!!?

So tomorrow, am gonna be hanging out with my F.W.B and I know it's gonna go down???(he's really good). The thing is, he wants a blow but I told him NO and he didn't push for it. Now however, I want to try it to give him the same pleasure he gives me and also to be able to say "been there, done that" but am completely grossed out by the fact that am going to be having sperms in my mouth; just the thought of it ughh!!! I really want to do it and be successful; I think it's on my bucket list. The thing is, I have no idea how to go about it and I don't want to look like a complete moron who just shoved a penis in her mouth. And what do I do about the taste of that thing; how do I overcome that fear of throwing up??? Help ladies...