I go over to my grandparents' house (mom's side) a lot to visit with them because I have a very special relationship with my grandma. She is probably one of the most supportive and loving grandmothers out there, and she knows about my sexuality and she loves, accepts me, and fully supports me for it. My grandpa on the other hand, seems to not be so supportive. I went over there today to have a discussion about my college decision and sexuality and my grandpa (who loves me very much but tends to often have a grumpy attitude, probably because of old age and because) was like "You really should let go of this whole bisexual thing, I don't want you to become promiscuous. If you date a girl, she wouldn't like it if you were with a guy at the same time. And maybe this bisexual thing won't even be a problem for you in college because I'm sure you will meet plenty of girls there that you like.". And then my supportive grandma (thankfully) quickly shut him down by saying "He can be bisexual and stay faithful to one person.", then afterwards my grandpa said to me "Have you ever heard of STDs? You don't want to get one.". He is totally blowing things out of proportion and acting like I am gonna become some male prostitute that sleeps with a bunch of people, which is totally biphobic. I am totally NOT promiscuous and when it comes to relationships, I am very committed to one partner. People can be bisexual and stay faithful to one partner, in fact, I am in a relationship right now with a really sweet girl and I have not slept with one guy during it. I told my grandpa also that I know a handful of bi girls that are in hetero relationships and stay faithful. I know all of these people who have been hostile and non-accepting still love me because they are supportive in other areas of my life. At first my parents were hostile and non-affirming of my sexuality (they weren't biphobic though), now they are more accepting of it and totally affirm of my life style, and now my grandpa seems to be a little biphobic. I seem to be getting different reactions from different family members. And it really gets aggravating.