Naw, my snakes are all very comfortable with me & I'm quite mellow. Getting dumped on is rare for me, but it has happened a few times over the years...the most
recent was when I had my rosy boa out in wintertime & she slid into my shirt, which I thought was cute & funny until I felt something warm going down my back...
I think it's pretty random, they don't "mean" anything by it, but if we're "teachable", we learn to look for puffiness above their vent before we get too comfy handling.
The one time with me she was around my neck chillin and had her butt tucked into the edge of my t-shirt all of a sudden the warmth was there. Grossest thing in my life. Threw the bra and shirt in the garbage. Lol!