Like with all people, gay men become sexually aroused when they see people whom they find attractive. Regardless of whether someone's attractions are inborn or second nature, it causes a physiological response in the body, and the body prepares itself for sexual activity.
The specific triggers for sexual arousal are specific to each person.
All males have the ability to get an erection.
no i do and i have a wife
Yes, in the same circumstances as straight men (only, generally not because of a girl)
Men get boners (or more correctly erections) when they usually see women or if they are gay another man. Women can discharge if they are sexually aroused by looking at a man. During puberty erections may come at unusual times. Mature men generally only get erections when they are sexually aroused. If a man is homosexual, this arousal will be triggered by other men. It's possible that you, on some level, find other men to be sexually attractive. It's also possible that while you were gazing at a man, your mind was thinking about something sexual, whether related to men or women.
Not unless you're getting the erections BECAUSE of the other guys.
Yes. Most men (gay or straight) are capable of getting erections from physical stimulation, even if there is no sexual attraction. Achieving climax may be difficult or impossible though.
No, it is common in most men who get random erections (erections that occur when there is no sexual physical or mental stimulation) or men who have prolonged sex with no ejaculation.
Some do some dont
They can do yes. These are called spontaneous erections or involuntary erections. They occur when blood suddenly rushes into the penis (erections are caused by blood flow into the penis). It's very common in men when they wake up in the mornings.
makes you think
yes some men do, but its more of a fetish than the norm
No, wanting to wear a thong and bra does not make you gay. A sexual attraction to other men makes you gay.
Yes. This makes the person bisexual, not gay. Meaning you like both genders.