One word of warning, you do realise that your current partner, your ex, his current squeeze, or both could be reading this don't you? :)) Plus who's to say his current partner hasn't infected him with a STD that you would likely catch, then pass on to your partner? Things like HIV, genital warts or Chlamydia can take an awful long time to show up (HIV can have an incubation period for several years before showing up on current tests for example) just some food for thought.