I don't think the ass can lubricate itself whether its a male or female.
this is ofc pure bullshit
the slimy coating of the inside of your ass is NOT LUBRICATION but a layer that PROTECTS your bowels. no layer = bleedings, ruptures, fissures.
If you want to fuck, use waterbased lubrication. For fucks sake and someone explain those retards who are drawing these shityaois how actual guys fuck.
Yaoi logic: asses are self-lubricating and can dissolve entire bananas