Since I have an unaccepting wife, I have no alternative to underdressing! I wear panties of all sorts of lovely colors all the time and that has never been a problem. Now, more care must be taken when you start to also wear bras and the chance of a strap being seen (or even felt) is much greater. That said, I also wear bras almost every day as I underdress and I have only been "busted", that I know of, on one occasion. I was at a Senior Citizen bridge game and one of the GG's there came around to help me with my hand and her hand trailed down my back and I'm sure that she felt my bra clasp. Later, she smiled and gave me a knowing wink. I've seen her on several occasions since then and nothing has ever been said!