The scholars state it is recommended to do this as filth can attach to the hair and it is included in the definition of pubic hair. Now I don't wish to use a razor but just a trim - looking in a mirror underneath and small scissors is very hard. If you are unmarried or the wife doesn't want to assist what can you do? Only a doctor if he is examining that area may see it without it being haraam. What other options are available? I can't think of any more.