Shamed golfer Tiger Woods,who's spending six weeks at a Mississippi rehab clinic,is facing an 18-week sex ban as part of his treatment. The sports ace,34,is apparently being treated for sex addiction,reports 'The Sun'. A former patient said: "You can't have sex and can't get excited. That continues for 90 days after you are discharged." Tiger will also have to sign a "celibacy contract" and write an "empathy letter" to wife Elin Nordegren,30. Ex-patient Benoit Denizet-Lewis said: "If they are serious about repairing the marriage,she will be spending some time in treatment with him."