Since I am heterosexual, I had no problem saying so. But lesbians trying to adopt are put in the position of almost having to lie. I understand it is even more difficult for single men though.

You won't find a solution by saying there is no problem

If the garage is full of stuff, the seller is saying there's no storage in this house.

My problem is that I do not get along with lesbians at all. They don't like me, and I don't like them.

If the person you're talking with continues to press you for more or can't seem to accept your answer, then you are being harassed. I know that sounds hard for people-pleasers to accept, but it's true. No means no.

No is a complete sentence and so often we forget that.
When we don't want to do something we can simply smile and say no.
We don't have to explain ourselves, we can just say "No".
Early on my journey I found developing the ability to say no expanded my ability to say yes and really mean it.
My early attempts at saying no were often far from graceful but with practice even my no came from a place of love.
Love yourself enough to be able to say yes or no.