Well here's a question? Have you ever had a girl say god you wear that kind of underwear? I'm pretty sure you haven't. I also have never had a guy do it to me. When it comes down to the act and you standing half naked I think the girl is more interested in what's under the underwear. Now some girls may prefer boxer brief or just plain boxers over tighty whiteys but honestly if she has sex with you more then once I think your OK. Hope this helps
I HATE boxers, especially in the summer, with the heat and humidity!! Guys sweat, and their parts sweat, and boxers are crap, and your, uh, well, everything gets hot, sweaty and sticky!!! Yeah, gross!!
Tightie Whities are kind of crap, too. Calvin Klein makes some good ones, but they are sized for little boys, not having room for 'things' even in the appropriate sizes!!