Advice??

Okay girls, so I’ve never had to deal with this in my past relationships but this new guy I’m with wants to cum in my mouth. My previous relationships I didn’t Like the taste and it absolutely turned it off for me.

How do I go about trying this again without feeling nasty in a way?

Do I spit it out after he’s done or swallow?

Swallowing sounds kinda disgusting too me but I also have never done this.

Edit: it’s not that I don’t want to do it, I do. I want to make him happy and it’s something I want to try, I just never have bc of previous relationship didn’t.