Our expert says:
I do not have enough information to answer your question fully. I would need to know what sex toy you used and is your girlfriend an asthma sufferer or does she have any other medical conditions of the lungs, does she suffer with anxiety, including anxiety attacks?
Intense sexual exersion and the the increasing sexual response rate during sex does result in higher heart rate, and heavier breathing and an intense orgasms can intensify these reactions, yet what you are describing, i.e. that she struggles to breath and that her chest closes up is concerning.
I would suggest that she see a medical practitioner who can then undertake necessary medical examinations.
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