THAT takes time.
I'm a girl and I have this straight friend (boy)
But I happen to be a big fan of gay porn!
So I invited him over and showed it to him xD
Just a small part, and it wasn't real, just anime(japanese cartoon/animation)
And I just talked about it at school and when I was around him.
A year went by and now he's insecure, he doesn't know if he likes men ore not.
He definetly likes women, but it means he could be bisexual.
Most guys have this anti-gay thing going on.
basicly because in school they want to be mister popular.
Hmmm... though I don't think my method would help ya much..
(talking about how awesome gay couples are and showing pictures of gays all the time)
Since somehow... guys think it's annoying when girls shove it in their face, but when guys do it they totally freak out.
If you got 2 chicks...
You could have like an orgy..
And then they beg for you two to kiss, and from one thing comes another..
HMm... no that's not it..
Like, don't guys sometimes watch porn and masterbate together ore something, to chicks?? Ore is that weird???
If it's really all about sex and not him..
I wouldn't bother all the efford of flirting and trying to make him bi.
It's a very difficult job. Besides, if you get the job done, he might fall in love with you for life, do you want to live with him forever?
Anyhow, there's a website for turning men gay, google it.
Maybe it required payment though.. can't remember!
Anyhow, just flirt carefully but stay yourself..
And whatever you do.. don't force it upon him.
Anyway GOOD LUCK!
I hope some gay guy gives you better advise then mine ^^'
(since they're experienced and all in this field and I'm not really)