Work colleagues asking what we do on the weekends.

Is it just me or do you find it tiresome I feel like I have to write a report for every Monday to let them know what I did then hear of they're weekends. I usually don't mind it it's not exactly unusual but after awhile... What about the weekends where I don't do much usually I'm just happy not to be spending anymore with them. I like to keep what I do in my own free time to myself, do I have a point or am I just being a bit grumpy today?.