<prompt> unaweza kugeuza matini haya ya swahilikwa kiingereza?uchunguzi umegundua kwamba kujamiiana ni mara kwa mara katika wanadamu wa jinsia na umri wote, ingawa kuna tofauti.  <response>: studies have found that masturbation is frequent in sexualpraktik of both sexes and all ages, although there is variation. 