actually some players....... they will tell you they are one. So
either you still choose to stick with em or leave. Of course there
are people who choose to stay altho after knowin one's a
playa........ 
so in this case i see nothin's wrong because
your the willing party
ever wondered what happen when 2 players meet? 
Actually, the players i'm trying to highlight
here, are the people female/male who purposely withold information
about their dating status. They evade the question when asked
and misled their partners into thinking that they
care about them ONLY and they are the
ONE, while they obtain sex/other
gains from their partners who might not have
accede/agree had they known the truth.
They do not have to
lie. They just have to keep quiet.
This is very different from the players that Lorry has
described. If they tell you they are one, they are not the real
players which cause as much unrest as the ones I've described.