Couples masturbating

Last week I noticed my man had jerked off into some Kleenex in the bathroom (I could smell the cum since I have a really strong sense of smell.)

The funny thing is, I masturbated in the bedroom at the EXACT same time, and neither of us knew it. I mean we didn't know about eachother masturbating at the same time. Weird?

We've been together for 5 years now, and we still have sex like 2-3 time a week, but sometimes it just feels good to touch yourself I guess.

The other thing is I think I may have been on my period, so maybe that has something to do with it. But it has happened before, and not on that week of the month.

Do you think this is normal for two people (a couple) to simulatenously masturbate, while neither of them know about the other?