(This one is a slightly weird one, so don't judge me)
One day, whenever Helbram and Harlequin were drunk off their asses, they decided to try something new. One thing led to another, and Helbram ended up getting fucked with Chastiefol. Don't ask me how, it just happened.
And now both of them are extremely embarrassed about it, so when Gowther invaded Helbram's memories, Helbram and Harlequin alike almost killed him to shut him up.