Is this outfit flattering?

It’s kinda my go-to “I don’t know what to wear but I want to be comfortable” outfit, I kinda feel like it’s a bit frumpy, if anything. But this guy I had over last night thru this morning, he got very… excited… when he saw me wear it, lol. Said I was tryna make him go for another round. Granted, he’s already someone who’s about it, but I wasn’t expecting that in regards to my lazy-time outfit lol