A "friend" with "benefits" = a relationship
Treetrunk buddies hook up for casual intercourse and then leave it at that.
In the event that you can't or do not want to tell apart and accept the real difference then you're staying in la la land. Giving blended signals, confusing yourself, skirting round the edges and perhaps just a little delusional.
LOL Moonman, you tickle me personally wanting to show people the huge difference. You have got heart Moony.
This term got swept in to the Computer motion as soon as the term treetrunk Buddy became too harsh for delusional individuals with impractical ideals.