Underpants are similar to slips with the difference that underpants have a leg joint. Underpants do not have to be very tight since they are supported by elastic bands like slips are. Mostly underpants are not considered very sexy but rather they are seen as turn offs since they do not fit very tightly and thus do not underline the female shapes. Moreover, the leg joint covers a lot of skin which is often seen as objectionable.