{{multiple image
|align     = right
|direction = vertical
|header    =
|footer    = Toiletpapirets retning, ''udad'' eller ''indad''.
|width     = 200
|image1    = Toilet paper orientation over.jpg
|alt1      = Over - danskernes foretrukne valg
|image2    = Toilet paper orientation under.jpg
|alt2      = Under
}}
[[Fil:Toilet-paper-roll-patent-US465588-0.png|thumb|Seth Wheelers originale (ca. 1891) U.S. Patent illustration.<ref name="dailymail">{{cite web|author1=Maybelle Morgan|title=Over or under? The age-old debate of which way a roll of toilet paper should sit is FINALLY settled... by a 124-year-old diagram|url=http://www.dailymail.co.uk/femail/article-3002112/Age-old-debate-toilet-paper-settled-patent-1891.html|website=Mailonline, dailymail.co.uk|publisher=Daily Mail|access-date=2. maj 2015|date=19. marts 2015|archive-date= 4. marts 2016|archive-url=https://web.archive.org/web/20160304134454/http://www.dailymail.co.uk/femail/article-3002112/Age-old-debate-toilet-paper-settled-patent-1891.html|url-status=unfit}}, </ref><ref name="huffingtonpost">{{cite web|author1=Jenny Che|title=This 124-Year-Old Patent Reveals The Right Way To Use Toilet Paper|url=http://www.huffingtonpost.com/2015/03/17/toilet-paper-actually-goes-over_n_6887724.html|website=HuffPost: Business|publisher=The Huffington Post|access-date=2. maj 2015|date=17.-19. marts 2015|archive-date= 6. oktober 2017|archive-url=https://web.archive.org/web/20171006100711/http://www.huffingtonpost.com/2015/03/17/toilet-paper-actually-goes-over_n_6887724.html|url-status=unfit}}, </ref>]]
Der er to valgmuligheder, når det gælder '''toiletpapirets retning''' ved brug af en [[toiletpapirsholder]] med en horisontal [[Rotationsakse|akse]] [[parallel]] med væggen: [[toiletpapir]]ets frie ende kan enten hænge ''udad'' eller ''indad''. Ifølge tegningen til patentansøgningen for toiletrullen skal papiret hænge udad.<ref>[http://ekstrabladet.dk/nyheder/samfund/124-aars-debat-er-slut-saadan-skal-toiletpapiret-vende/5488217 19. mar. 2015, ekstrabladet.dk: 124-års debat er slut: Sådan skal toiletpapiret vende], [https://web.archive.org/web/20160911043923/http://ekstrabladet.dk/nyheder/samfund/124-aars-debat-er-slut-saadan-skal-toiletpapiret-vende/5488217 backup]</ref><ref name="dailymail"/><ref name="huffingtonpost"/>
Psykologi Samfundsvidenskab