For about a year and a half now, I've noticed that whenever I would makeout with a girl, without any feeling of orgasm, I would ejaculate into my underwear.

This could be speculation but I started vaping and using nicotine around that time (to which I have now quit recently)

I also was an avid masturbator to porn and I'm just trying to pin point what I can do to fix this.

Any help?
Was thinking it could be hormonal as my dopamine would be out of whack due to the nicotine but never had the issue prior to the use of it.