The only way to know this and even then there is some question is to explore your sexuality. There are a number of things that may sound good or erotic when they are in thought that you may not be able to do when it comes down to it. There is also a wide difference between wanting to do some guy orally and being good at it or going past the exploration stages.
If you find that you really enjoy and get personal pleasure from performing this act (and there are many that do) you will then need to explore other aspects and or acts of sexual satisfaction between two men. You may find that you like some and dislike others. This is normal.
The next thing is to not label yourself as anything. A single gay sex act of any kind is not a marker for any kind or orientation. The number of males that jack off together to straight porn and even take each other off is staggering and most move on to heterosexual sex when the opportunity presents itself.
If you discover that you enjoy heterosexual sex acts and gay sex acts equally then if you insist on a label, you can then if YOU choose legitimately classify yourself in your own mind as being bisexual. If you enjoy one more than the other the appropriate classification might apply.
It is all a matter of degree.
You will notice that there is a percentage number here when it comes to straight or gay. This is the reason for that number.
The final thing is in fact not a sexual thing but an emotional thing. If you are not able to have an emotional connection in any manner with the person you are engaging in sex then you cannot judge anything by that person. If you are more easily able to have an emotional connection and attraction to a sex partner of a given sex that is the side that really dominates.
If you for example find yourself sexually attracted to men in emotional ways in that you enjoy being with them or contemplate what a life with that individual might be like that is an indicator of an emotional connection.
As a general rule most men are basic horndogs, most guys claiming that they are 100% straight can under the right circumstances successfully complete a sex act with a man. Conversely the same is true of a gay man having sex with a female. It is physically possible and in fact likely that it easily can be done, but the emotional connection may or may not be there to sustain the relationship.
If you must use a real marker for yourself use the emotional connection rather than the physical desire. Physical desire is simple horny, emotional connection means a great deal more.
Good Luck
If you find that you really enjoy and get personal pleasure from performing this act (and there are many that do) you will then need to explore other aspects and or acts of sexual satisfaction between two men. You may find that you like some and dislike others. This is normal.
The next thing is to not label yourself as anything. A single gay sex act of any kind is not a marker for any kind or orientation. The number of males that jack off together to straight porn and even take each other off is staggering and most move on to heterosexual sex when the opportunity presents itself.
If you discover that you enjoy heterosexual sex acts and gay sex acts equally then if you insist on a label, you can then if YOU choose legitimately classify yourself in your own mind as being bisexual. If you enjoy one more than the other the appropriate classification might apply.
It is all a matter of degree.
You will notice that there is a percentage number here when it comes to straight or gay. This is the reason for that number.
The final thing is in fact not a sexual thing but an emotional thing. If you are not able to have an emotional connection in any manner with the person you are engaging in sex then you cannot judge anything by that person. If you are more easily able to have an emotional connection and attraction to a sex partner of a given sex that is the side that really dominates.
If you for example find yourself sexually attracted to men in emotional ways in that you enjoy being with them or contemplate what a life with that individual might be like that is an indicator of an emotional connection.
As a general rule most men are basic horndogs, most guys claiming that they are 100% straight can under the right circumstances successfully complete a sex act with a man. Conversely the same is true of a gay man having sex with a female. It is physically possible and in fact likely that it easily can be done, but the emotional connection may or may not be there to sustain the relationship.
If you must use a real marker for yourself use the emotional connection rather than the physical desire. Physical desire is simple horny, emotional connection means a great deal more.
Good Luck