So You've Bought trứng rung ... Now What?
https://wiki-velo.win/index.php?title=The_Most_Common_trứng_rung_Debate_Isn't_as_Black_and_White_as_You_Might_Think_50451
Double ended dildos or double enders, come in the form of the conventional dildo but are considerably longer which allows for double penetration. Usually in the form of jelly dildos to ensure more easy insertion