Over the course of the series' history, "Hollyoaks" has dealt with a number of storylines based upon serious issues. Given the large and established proportion of young viewers, some feel that the soap opera is an ideal platform to show a variety of issues affecting young people. A telephone helpline number is often displayed after episodes that feature a particular emphasis on a story that may have affected viewers. Social issues that the soap has dealt with include: abortion, suicide, euthanasia, homelessness, human trafficking, illegal immigration, homosexuality, bisexuality, being transgender, gender identity disorder, homophobia, racism, far-right extremism, alcoholism, drug addiction, gambling addiction, HIV, sexually transmitted infections, sexual harassment, rape (including male rape and marital rape), incest, underage sex, child abuse (physical and sexual), child grooming, sexual consent, domestic violence (including parental abuse by children), anorexia, bulimia, body dysmorphic disorder, self-harming, county lines drug trafficking, depression, bipolar disorder, schizophrenia, post traumatic stress disorder, obsessive compulsive disorder, autism, Down syndrome, sepsis, bullying, child abduction, fostering, teenage pregnancy, sudden infant death syndrome, stillbirth, deafness, cancer, spina bifida, epilepsy, multiple sclerosis, Munchausen syndrome, motor neurone disease, and frontotemporal dementia.