My friends want to tie me up?

So recently my 2 best friends both girls as well that I've known for ages, have been trying to tie me up. We'll be hanging out as normal and then they start acting really playful and then they both start trying to tie me up. They haven't actually tied me up as of yet, but they'll grab whatever is around like a scarf or something and I always struggle free before they can. I'm wondering is this weird, is this normal, should I just go along with it and let them tie me up?

My friends want to tie me up?
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