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Do you always play with a full deck

a third person? for what..

moral support?

cheering you on?

bringing you m&m's and gatoraid afterwards?

a safety officer to make sure you're being safe?

an impartial witness of consent?

to run and get molasses if you get a cramp?

to pop you with an electrical shock if you're getting tired?

to hold pictures of mom if you're getting over excited?

to ward the dog back from getting involved?

for use as a dj when slacker radio keeps messing up your playlist?

to yell out his or her name when they say "say my name!" and for some reason you draw a blank?

to lead you in musical positions?

to monitor and record your vitals?

to call out the play by play for the neighbors?

to take tickets at the door and record everyone's bets?

they seem like perfectly valid reasons to me, surprised you haven't had any volunteers

If you're needing a 3rd person....someone is not being satisfied
Try Craig's list

you can use the facilities. please don't get chocolate icing in the hot tub, not too much anyway

clogs up the filters! can burn the pump up lol and it'll void the warranty heh