Was this playful bump flirting or a sign or sexual attraction?

[Anonymous]

If a female co-worker who is usually reserved (she told me she's an ambivert, more so on the introverted side), likes her personal space, doesn't normally touch people or socialize a lot, walks by you and bumps your arm while saying hello or making a funny comment, is that a sign of sexual attraction? It feels like she subtly flirts with me sometimes when we talk, but I'm not sure.

[pajamasam]

Sexual attraction? Possibly...

Its hard to say for sure but we can know one thing.

Someone who does not like physical contact, who made physical contact, definitely wants you to notice it.

I'm not sure if it was sexual attraction but I feel pretty confident that she was definitely testing your boundaries she wanted to break the touch barrier for some reason...

Was that reason due to sexual attraction? Possibly but I don't know.

You should return that playful gesture sometime and see how she responds.