Theoretically I can be touched by anybody who I like (and feel safe with or close to), though now I have a partner I don't encourage other women to touch me much at all if they could be construed as potential sexual rivals. That's just an ethical thing, emotional fidelity and a respect for my partner's feelings. I don't have any close female friends except for my partner anyway. Even with blood relatives I keep touching to a pretty demure standard - we're not a very touchy-feely family. I'm fairly happy for men to touch me, within the usual social limits, though they don't do that very much.
Naturally my partner can touch me a heck of a lot more than anybody else can, but when it comes to being suddenly and unexpectedly touched, it gives me such an unpleasant jolt that I don't even let her do that. And from outsiders, it's practically an act of war to me.