When he tries to “get a rise” out of you😂

So my boyfriend and I had a brief period of time when we broke up, it was about four months. My boyfriend told me that during that time, he was “experimenting” and had a guy give him head because he wanted to see if he was gay or not. Later, he told me that this never happened, and that he was just trying to get a rise out of me.

I’m just wondering how this is suppose to get a rise out of me??? Yes it’s immature, but I feel like I would be more annoyed if this happened with a female, and it would be expected for him to do this with a female? I’m just so confused honestly