Is it true that being on the pill messes with who you're attracted to?

It's a partial truth taken out of context and exaggerated.

At the ovulation stage of the menstrual cycle, some women become, to a degree, more attracted to less masculine men (if you're wondering how that makes sense, lower testosterone is correlated with paternity). Because hormonal birth control prevents that process from occurring, it may also prevent that small shift in attraction from occurring.

However, no studies have been done on the subject, and there is, at present, no evidence to indicate that there is a significant effect on who a woman is attracted to based on her use of birth control.

a who what now? urban legend perhaps, bad lie/excuse amplified into urban legend. if it is a urban legend at all.