Is this normal in the work place?

My girlfriend works in a place with lots of other people. The male co workers often check her out. I know that's pretty normal. But they also ask her a lot of weird and person questions. Like today she told me this morning a guy asked her if she's ever dated a black guy, she said no, the guy then asked if she's ever slept with one, etc. The guy isn't even black so it's not like he was asking to see if she'd be interested. She's also told everyone there she's taken. But they often ask stuff like that. Or like what she likes about a guy or weird shit like that. I'm kinda uncomfortable with guys asking her that but she says she's use to it and it's been like that everywhere shed work were men were. Is that normal? Am I weird to feel uncomfortable about that?
Is this normal in the work place?
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