I remember the episode where Arnold (Gary Coleman) wanted to take up ballay dancing, and Willis (Todd Bridges) didn't want him to and tried to get him not to, because he felt embarrassed being Arnold's older brother because he thought that Arnold looked like a sissy doing ballay dancing.
Willis was probably afraid that Arnold would probably become gay and he couldn't deal with it, so he talks Arnold out of it to protect HIS integrity to try to make HIMSELF look good with his friends.
