I think a woman’s first reaction often is who are you trying to get into bed with automatically associating the product with the need to attract a sexual partner.
Depending on the type of relationship you have with your spouse would determine where it goes from there but I think a bit of honest communication about the enhanced sense of confidence you experience would be not hard to understand or at least appreciate.
Men are so caught up in their dicks to the point of major impact on identity and sense of masculinity.. no doubt some more than others.
Then there is the whole penis enlargement story which may or may not factor into the equation. Some women may even get turned on with the idea as Christian relates while other may just shake their head in bewilderment.
I guess it depends on how stealth you want it to be and whether you feel your spouse can relate or not.
keep us posted on how the story unfolds!