i guess it really depends on the image you want to project. sure, white looks neat (no need to contest that) but i don't think it's "sexy talaga." Pero it can be sexy naman. For me what is "sexy talaga" is black. white screams "i'm clean and innocent." black screams, "i'm hot and sexy."
anyway, that is just my opinion. in the end, white or black sando, if you don't have the a nice body to clothe it with naman, wala rin kwenta. hubog ng katawan pa rin talaga magmamatter.