Yes, we're both humans. It always happens after I have an orgasm. My pussy just tightens and locks up and once it locks up it stays tight. I couldn't get it to release even if my life depended on it. It's fun though. My boyfriend pulls me all over the bed and I just love watching him struggle trying to pull out even though it won't even budge. I love it, it feels wonderful. I'm sitting on his hips as I type this on my phone. I'm not complaining, but why does that happen?