Because of course they did. See how else actor Megan Fox and rapper Machine Gun Kelly celebrated their engagement after more than a year together.
Megan Fox Drinking Blood in Machine Gun Kelly Engagement Leaves Fans Horrified
Machine Gun Kelly (musician) - Wikipedia
When Megan Fox created a storm on the internet with controversies
Megan Fox Confirms She and Machine Gun Kelly Do “Drink Each Other's Blood” But Only For “Ritual Purposes”
Megan Fox and Machine Gun Kelly's Relationship Timeline
Megan Fox is 'on a break' from Machine Gun Kelly as pair try 'to work on their issues' - Irish Mirror Online
Halloween's Early! Celebrity Couple Drinks Each Other's Blood
Did Megan Fox, Machine Gun Kelly Break Up? Did He Cheat on Her? Split – StyleCaster
Metal Or Not?: Machine Gun Kelly And Megan Fox Drink Each Other's Blood To Commemorate Getting Engaged
Megan Fox Manifested Machine Gun Kelly When She Was 4 Years Old
Machine Gun Kelly takes knee under tree, Megan Fox says yes
Megan Fox Shocked To Find Unexpected Messages In Machine Gun Kelly's Phone
Megan Fox Machine Gun Kelly Relationship Timeline
Fans Concerned After Megan Fox Snubs Machine Gun Kelly In 'Awkward' Footage
Megan Fox, Machine Gun Kelly get engaged, drink blood - Los Angeles Times