What do the abbreviations mean?

Orifices: Vagina= Lady, Mouth= Mouth, Anus= Butt, 

Sleeves: SB= Speed Bump, SR= Super Ribbed, ST= Super Tight, WW= Wonderwave

FLG=Fleshlight Girls, FJB=Fleshjack Boys

Other: STU= Stamina Training Unit, Lube= Lubricant, BYO= Build Your Own