This is kind of a tricky question. Not really tricky, but I'm having a hard time putting my opinion into words.... Does she smell like your sperm or "sex", or do you smell a different odor on her? Have you been with her a while, so you know what her odor smells like, right? I ask because it would be normal to smell like her normal sexual odor during sex, but if she has a whole new odor to her and you are having sex, I think I'd worry a little. Everybody has their own unique "odor", you know what I mean? Next question...is the odor bad, or fishy? Because if that's the case, she could just have a yeast infection or something like that. Hope this helps....
It could be a change in her body chemical and just happens to smell like semen (I think you two mean semen. Sperm are the microscopic little swimmers, and you guys would have to have amazing noses to smell them.) If it's just a cucumber or salt smell, not to worry. But if it gets to smelling sour, she should get swabbed for a vaginal infection like yeast, thrush, or BV. If she has an infection, she might need a course of treatment from the doctor, and you might need it too in order not to pass anything back and forth once her treatment is over.
Don't worry, she's not going to be volunteering that she smells like semen if it's someone else's semen.
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