If I'm pushed I'd also have to admit I don't like people with allergies. They just annoy me. There seems to be something far too self-centred about it. 'No thanks I'm allergic.' Why not just say 'No thanks'? I wasn't asking for your medical history I was just passing around the nuts. Trying to be friendly that's all.
The secret to a long-lasting relationship is perpetually imagining the worst. It's a world view tracing back to my Eastern European ancestry and one I draw upon regularly.