If you ask a girl this question, they would probably say that more than once a day is too much.  But if you ask a guy the same question, they would say that there's no such thing as too much sex.  I would agree with what most guys would say.  However, if sex becomes more like work rather than enjoyment, then you've reached the limit on sex.  For the guys who think that looking at porn is sex, that doesn't count.  The guys who think that there's no limit on sex have to know how to pace themselves.  You gotta have the balance of drinking, partying, work, and sex under control.  When a girl says that you're moving too fast with her or that all you care about is sex, explain to her your needs and balance in life. If you're with a girl who doesn't respect your balance, then you should break up with her.  Different guys have different limits and have different needs that have to be satisfied.  Think about this question if you don't know where to stop with sex.