Announcing you’re cumming?

Every guy I’ve ever been with has always told me when he’s about to cum in some form. Either by telling me verbally or louder moans. Personally I’ve never came in someone’s mouth without asking them beforehand if that’s okay and then I’ll say I’m cumming to.

Last week I was giving a guy oral and as I’m sucking him off he just starts cumming without warning. I don’t exactly like the taste of cum but I’ll swallow as it’s just easier. Knowing they about to cum I can adjust their penis and make it much easier. But this caught me off guard and it made me gag and went everywhere.

I weren’t mad since nothing was said but got me thinking =

For everyone = Do you tell them beforehand where to cum? / Do you get them to tell you as they cumming? / Would you be mad if someone came in your mouth without being told they could??