Questions from Reddit: "Am I Gay?"

Does having 2 gay experiences change my sexuality even though I am straight?   (21m) 

You are what you are man. Technically there is a difference between Sexual Orientation and Sexuality Identity.
That being that Sexual Orientation refers to your actual attractions, behaviors, emotional connections, etc. It's not really binary or tri-nary. Many people find the Kinsey scale useful, which ranges sexual orientation from 0 (exclusively heterosexual) to 6 (exclusively homosexual), with varying degrees in between. However, Kinsey himself noted that even this was limiting, and that he could have made a 0 - 100 or 0 - 1000 point scale, but 0 - 6 was just more convenient for people to use.

Similarly, Gay/Straight/Bi are just convenient monikers for people to identify themselves.

So - you are what you are, don't get caught up on labeling it, because there's no way that any label is going to 100% suit your specific, complex sexuality. Said labels are only as useful as they are convenient, do not feel obligated to fit so neatly.

Am I lying if I tell people I am straight?

Nah, everyone doesn't need to know about who you've seen in the bedroom.

For instance -- Imagine there's a guy who's a meat-eater/omnivore. One day, on a whim or because someone convinced him to , he decides to eat vegetarian for a weekend. He finds it: meh.

Now - is this guy lying if he tells people he's a meat eater/non-vegetarian because he had a couple encounters with that side of things? I would say no. If he felt comfortable or was particularly close with someone, he might share with them that he'd given vegetarianism a try a few times. He might even have a veggie meal or two in the future, but ultimately he understands where his true interests lie and how far he's willing to go with .. kale.

The most important thing is that you don't give yourself a hard time about any of it.  You are who you are.