<human>: I have a bad habit of swigging the last drops of liquid from the bottom of soft drink cans that my friends leave on the sides of their desks/tables (I am a student, so naturally all of my friends are sub-humans who can't find a bin). What I usually do is pick the cans up and swill them around to check how much liquid is left in the bottom and then knock them back and suck hard for a small refreshing drink. If they have been left for a few days then some of the liquid has evaporated leaving a greater concentration of sugar and flavourings, so the drink is extra strong. Yum! So anyway, I went to visit a friend and as usual they had a can of cola laid almost empty on their living room table. I grab it, swill it round. It sounds fairly full, I think I'm in for a treat. As the 'liquid' enters my throat I come to the stark realisation that it's not a liquid. In fact it's alive. ANTS!!! FUCKING ANTS!!! I immediately spit them out and feel disgusted with myself.  
In a similar incident my friends topped up an empty can with piss and tricked me into drinking it. This produced similar results.

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<bot>: I regularly swig the dregs from soft drink cans. It turns out I'm not the only creature to enjoy the sugary goodness. Also, my friends are dicks.