In Leeds, 19-year-old Jack has been enjoying the sexual benefits of an open relationship, but perhaps a little too much. Just before he is due to see his boyfriend in Spain he has a sexual health scare which sees him running to the clinic and having to deal with the consequences.In Exeter, Kev has been told that one of his exes might have given him chlamydia, Tilly's worried about a potential unplanned pregnancy and free spirit Chantelle can't see why the risk of STIs should stop her experimenting sexually.