Boys get the message that their pursuits in STEM fields are supported at every level. Providing opportunities for under-represented groups does not by default send the message that over-represented groups are not valued.

Here are some messages I've received as a founder of a STEM field startup.

From an Angel Investor presentation: "You don't have even one token male on your board? We would feel more comfortable with your proposition if there was."

From a reporter: so really it's your husband who's helping you out and doing the hard stuff. (husband is not even on my board).

I could go on.

Boys will likely get the message that their parents filter down to them. We have the opportunity to help our kids form opinions by providing reference through our own attitudes.