Nah, believe in the magic. Arousal increases blood pressure, which increases the risk of nose bleeds, and sure there were probably other factors but the point is there's ALWAYS other factors so it was definitely the situation and no one can prove otherwise

Your sinuses are lined with erectile tissue thats triggered by the same chemical flood as triggers penile engorgement, so its genuinely possible they are related, if you had some sort of thinned skin or abrasion or something up there that got… changed, i guess? Moved or filled with blood under pressure causing leakage or whatever.