the same ways you know if the opposite sex likes you. human nature doesn't change.
A straight guy is someone who likes the opposite sex.
If you mean hetero-someone likes the opposite sex
there is no opposite. a zebra is a zebra.
Daddy.
A gay person is someone who likes another of the same sex
siblings
Sexual arousel can vary from person to person day to day. As long as it is not perversion you should be o.k. and as long as the opposite sex or same sex are consentual.. to be avaivable to have sex
Cross dressing is wearing clothing usually associated with the opposite sex. This can range from a guy who wears women's undergarments to "you really can't tell it's a guy" drag. There is also "gender-f**k" which is to cross dress while maintaining some characteristic that contradicts the clothing. For example, a guy may cross dress but not shave his beard. == ==
Dating is a social appointment, engagement, or occasion arranged beforehand with a pacific person. Another way to put this is dating means when a pacific someone loves/likes a pacific person of the opposite sex or maybe even the same, so that pacific person asks if that person he or she loves/likes to go somewhere with them or to be there boyfriend/ girlfriend.
it means your friend of the opposite sex tried telling you that he/she likes you with out actually saying "i like you" instead he/she just said you make me uncomfortable...
date them. being in a relationship with a person of the opposite sex is the way it is supposed to be. It will be much better with someone of opposite sex. also you are most likey not gay if you are having feelings for someone of the opposite sex. embrace this feeling.