What reasons would you wear a mask? (humorous answers please)

I showed a socially awkward friend of mine a picture of my then gf... he asked if he could watch us have sex... I said sure.... but I’d want you to wear a creepy mask... he asked why? I said it’s like you’re just a stuffed animal on the couch... less awkward... he agreed... I told my gf and she laughed and said... set it up!! We didn’t but sometimes we say we’ll do it... as for my friend he still sends me mask photos by text sometimes... fun stuff.