Why do gays guys try to convert straight guys?

We don't try to convert straight guys.  

We don't need to, there are plenty gays already.

Disclaimer:  Maybe if the straight guy has a very nice butt, then we might try to convert him.    (sarcasm) 

Awaken, not convert. Or just testing to see if they might be closeted homosexuals (as very many are). Or at least willing to make an exception.

Gay men do not try to convert straight guys. If a straight man is concerned about this I would question how comfortable he feels in his own sexuality.

We gay men could equally ask why straight ones think one good sh*g with them would turn a lesbian straight.

If you are suggesting gays try to convert straight guys into joining them in bed,  I am afraid any gay guy who does that will be disjointed and so have to revisit his hand for the night. A straight person can no more be converted than can a gay guy. 

That said.

A gay guy might convince a closet bisexual or closet gay guy to entertain his advances if he works it right. I guess in this case if others learned of it they might miss read the circumstances and assume the gay guy converted a straight guy when the reality is this did not happen.  The guy was always ready for the picking.

Some people use the term bi-curious to explain away these encounters and that is all bi-curious is, a way to explain what has been done with out admitting the truth. 

Why do straight guys try to convert us lesbians then?

They don't.  You are stating a false premise like so many other manipulators and liars.

It's not a matter of conversion.

It's more that straight guys look at the hassle-free lives men who love men experience.

And this leads them to try man-to-man love.

And many of them decide to stay.  

Why do straight guys worry about being converted? Gays have nothing to do with your sexual insecurities.