Mine happens most during meditation or right before sleep when my mind is quiet. I’ll feel pressure on my chest like someone’s hand is there, or this warmth spreading through my whole body. Once you start noticing it, you realize it’s been there all along, you just weren’t tuned in to perceive it.
My DM mentioned once that he’d been thinking about touching my shoulder, and it was the exact same moment I felt that warm pressure there. That kind of freaked me out because there wasn’t really any other explanation. It might be a sign they’re thinking of you sexually or the other way around.