OA lang ba ako? Kasi I didn't find the joke funny

I (24F), have a friend who made a joke na sexual related.

For context, I'm bi and my friend (straight siya btw) knows that I am one. We were talking about gift wrapping and I used the term "pamatong" because maraming layer ng wrapping ang balak ko.

This friend suddenly said "Si my name papatong yan. Top yan eh." The group laughed, I didn't. If wasn't funny for me so I stayed silent. I knew it was a joke but I felt uncomfy after hearing that. I'm not mad tho. I just don't like na naging subject ako sa ganong joke. Hindi ako naglalabas ng horny side ko sa friends ko so no one can blame me na baka kasi mahilig kang magsabi ng ganon.

Hindi na need malaman ng lahat kung top or bottom ba ako because I want to keep things that way. Just wanted to share my sentiments. Thank you 😊