Attention: Please refrain from any kind of variation on "I know this may sound sexist, but ... [sexist statement]."
It's not getting anywhere with me. Including the comment "I probably shouldn't say this" doesn't make it any better.
If you feel the need to say it, just stop. Keep it to yourself. Prefacing your sexist comment with something that tries to negate its sexist nature will just make you look ridiculous.