Allergic reactions to sperm are, unfortunately, very real — and there are apparently different types In an essay for The Conversation, reproductive science specialist Michael Carroll of the UK's Manchester Metropolitan University explained that allergic reactions to sperm range from allergies to a partner's sperm to reactions to one's own — and there's even evidence of some cross-contamination in sperm that can cause entirely different types of allergic responses, too. Though it's still considered relatively rare, the most well-known sperm allergy is what's known as "seminal plasma hypersensitivity" or SPH, in which women who have sex with men react to proteins […]