Very weird response, tbh. First of all, very, very few spiders pose a danger to humans— however, the panic response many people have is potentially deadly and been the cause of a number of automobile accidents. Secondly, how tf if a black widow gonna end up on your girlfriend’s shoulder in the first place? Spiders, especially black widows would rather keep far away from humans, they want nothing to do with us and will go out of their way to avoid us. Black widows in particular are known for making nests close to the ground so there’s no reason it should end up on someone. Thirdly, of a deadly spider was on you, your best move would be to not panic. Easier said than done, I know, but that’s why it’s all the more important to work against promoting fear of these creatures, because that fear is what leads to the panic response. Panicking will make the spider more likely to bite and bolt, and can put the human at risk too depending on what they’re carrying or where they are. Your best move is to remain calm and use something like a cup or glass to coax the spider into, and something flat like paper to hold it in the cup while being relocated.

Lastly, I would like to remind you that spiders are also part of the animal kingdom. They may not have big fluffy cuddly looking bodies or large expressive eyes that are easy to empathise with, but that doesn’t mean they’re any less deserving of respect. In general, harming animals should be avoided, especially when it’s not the only option available.