I get hard when I get happy

Just sharing it here because i think it's pretty weird. So whenever i am having a happy moment like hanging out with friends, visiting a nice place, watching a beautiful sunset, I get an uncontrollable erection. It wasn't affecting me until recently

i was with my friend group and laughing and all when suddenly i get rock hard. It was so hard that it was visible from my jeans and one of my female friends saw it and confronted asking do i have feelings for someone in the group or am i just tharki in general. How do i explain it to her that ITS NOTHING LIKE THAT.

Even if i am watching funny reels, it happens and i think to myself dude why the fuck am i so weird. I know there is no solution to this i just wanted to get this off my chest and i am a little bit concerned that it can become a problem in future and i can get labelled as a molester or something .

I know i am overthinking it but still. Also any advice is welcome.