You may not have known this . . . but former tennis star Bjorn Borg now owns a designer underwear company.  And they just did a survey on sexy underwear.  Here's what they found:          

--14% of Americans say they wear sexy underwear just in case they seduce someone . . . and 18% wear it because they "want to be ready for action."          

--49% of us wear it for ourselves, just because it makes us feel good.  And 47% wear it to look good for our partner.   

--79% of us wear sexy underwear on dates . . . 57% wear it when we go out partying . . . 59% of us wear it when we go out to dinner . . . and 24% wear it to the GYM.

--42% of people say they wear sexy underwear EVERY DAY . . . but 19% of us NEVER wear it.