I think it's because I believe 99% of the population wants more than I'm willing to give, but I yearn so viciously for what everyone takes for granted in a relationship.  I want the cuddles.  I want the petting.  I want the hugs.  Sometimes I even want kisses (not today, for some reason, but sometimes).

And I believe the sexual portion of my community (read: everyone but me) utterly reduces cuddles and petting to something one trades for orgasms.

My pack and circle are pretty good at the hugs.  Occasionally even snuggles.  But our schedules are such that there isn't much opportunity for cuddles, and petting only happens in the guise of a massage, and that is almost always from someone who is almost out-group.

I don't like it when my friends get together.  I'd like to be happy for them, but any such happiness is outweighed by the conviction that any physical attention that used to be directed at me is now going to be directed to the significant other (meaning, in contrast, than I am not significant).  My son says I have a rule that my friends should "date outside the pack."  Completely unenforcible, even if I called it a "rule", but that's what I'd prefer.  Bring in new blood!  Don't steal any more of my few friends away from me!

I don't get to own people.  But I do own my car.  I do own my bed.  People understand when I take offense if they borrow or share either without my permission -- but I'm not sure they understand the full connotation.  The bed and I are a package deal.  I don't believe I'm offering enough to make those I desire share contact with me, so I lure them with my (fairly amazing, if I say so myself) bed.  Not that this is effective, but this is why I'm upset if someone sleeps in my bed without me -- especially if sharing it with another: THE BED AND I ARE A PACKAGE DEAL. YOU DON'T GET TO HAVE IT WITHOUT ME.

I don't often let others drive my car, and that's not because it's a manual transmission.  I've gotten better about it with Son1 since he had his permit and now his license.  But blood of my blood is me.  With anyone else, if they ask to borrow my car my reaction is not dissimilar to how I'd react if you asked to make out with my boyfriend.  I don't get to own people, and this imaginary boyfriend would have his own agency I am bound to respect, but I do own the car and the car hasn't any agency and THE CAR AND I ARE A PACKAGE DEAL.  YOU DON'T GET TO HAVE IT WITHOUT ME.

Meh.

Wild wolves are not like captive wolves.  Wild packs are almost always familial - an alpha pair (read: parents), their juvenile offspring, and their cubs.  I am the parent, my sons are the cubs, and the roommates not my juvenile offspring, but still not parents themselves.  I'm happy with my pack.  I'd like a mate, but I guard my dictatorship a little too jealously to take on another alpha.

My circle is larger than the seven in my pack.  Former roommates, party guests, work friends.  Some closer than others.  Mostly defined by "if there was news or godforbid a secret, who would be in on it?"  There's always an in-group and an out-group.  Most people are in several distinct in-groups.  But little wounds me as quickly as getting the impression that I'm in-group -- part of a package -- and then being slapped in the face with the contrary.