Is it farther or further?
c.1600, a cant word introduced from the Continent, probably from dialectal German strollen, variant of German strolchen "to stroll, loaf," from strolch "vagabond, vagrant," also "fortuneteller," perhaps from Italian astrologo "astrologer." Related: Strolled; strolling. The noun is 1814, from the verb.
A lewd or suggestive publication; a pornographic book or magazine; Fuck Book: It took a stroke book for me to break the ice
[1970+; fr stroke, ''masturbate'']