i hate angst but here it is.
When James and Regulus were together in Regs 6th year. Sirius had a tattoo gun. When James and him were alone in the dorm they thought it was a good idea to tattoo and little "J" and "R" on each others hips bc no matter what happened they would always at least be friends.
After 5 years they meet again. The war is over and the wizarding world is safe (no help from dumblewhore). Regulus and Sirius reunite and fix they're relationship reconnecting James with Regulus again. Regulus is in a shorter shirt that's tight around his torso and ends at the middle of his belly button showing off the beginning of his v line and his hips. The singular "J" is no longer there but is replaced with "JFP" directly on Regulus hip bone. Which causes James to forget how to breathe and completely stare unashamedly because not only did Regulus not cover up the little part of him that was left after they're split. He added onto it making it undeniably obvious that him as a whole belongs to James and always will no matter what side of war was chosen or how long the split lasted.