[NSFW!]Boring question #36: Is she being very trustful if she allows this or will she do it because she is very freaky?

[NSFW!] When a woman engages in buggery (being penetrated anally) is she doing so because she really trust her man or is she doing so because she is just overly freaky or kinky? If you are female you can answer if you would allow a male to part your sphincter is it more because of pleasure or because you trust him not to make it hurt even if you are not much into being buggered?