No Tea

I don't really understand how my brain decides that fruit teas (as in the kind that are just fruit and spices - no tea - in a tea bag) taste like tea. This evening I tried an ASDA Blackcurrant Infusion which was less tea-like than the lemon one but I still think that it has that distinct tea taste. It warmed me up nicely and the "taste" was sufficently masked by the blackcurranty flavours that I will most likely have another but... why can't they just taste of no tea?