Would you care?

No problem if it's accidental. Like one time my guy was titty-f**king me and it just shot up in the air and onto my face. That was funny and we both laughed. I don't think anyone's ever done it to me on purpose without asking, but I'd probably be mad.

The first time I gave a blowjob I got nervous when he said he was going to cum and I pulled him out and he came all over me, but that was my fault, I think. It didn't seem like he was trying to.

It's a bib no no if she's not expecting it. I would be mad as hell!

Depends what mood I would be in? But I prefer it in me less messy lol plus my mouth is also less messy and much more preferable so if it was by accident I would tease and say I'm not going to go down on you :P that's a way better and more nicer/pleasing form of punishment don't you think lol :P

ALWAYS ask. How can it be a mistake? A guy knows when he's about to cum - or at least any guy I've ever been with has known. A guy knows how to open his mouth and say "Is this okay? "

I'd be pretty annoyed if my guy did it without permission.

Without permission, I'd bite off his dick :)

I'd rather just have it in my mouth or on my boobs

If he does the woman could make him lick it off. That might teach him to do it without permission.

When a woman's face is involved, ask first. Anything else is usually fair game. Belly, boobs, inside. After all, not everyone has that porn sex experience!

Ya you should definitely not cum on her face without asking... that is unless she is super cool about that kind of thing. I mean if you make her angry about it, she could easily deny sex in the future. I don't really know what you mean by a mistake. I did it once on purpose and the girl got really mad that it was in her eyes/hair/nose/ears and ya that was pretty much the end of that relationship.

Just take a page from the movie "The 5th Element"

Eto Akta Gamat!

If you don't ask, Jessica will bite off your dick and that doesn't sound pleasant at all.

Always ask man. Always.