Welcome, and enjoy LSPG. Pretty much with everyone else here, nothing wrong with checking out other cocks, Curiosity is a great thing. But sucking, or otherwise engaging with a man / cock makes you at least open minded, if you enjoy it and want more then maybe bi. Dont really thing thinking about doing anything makes you gay. I have a lot of straight mates who get off on the thought of jacking off with a guy or playing with another cock, but i dont think they ever will. If its something some one does once and never again, i would still think that person is open minded but still straight.