So my husband and I are having sex every other day. But I am testing to see when I ovulate, he told…

So my husband and I are having sex every other day. But I am testing to see when I ovulate, he told me last night not to tell him when I am ovulating, because it will put too much pressure on him, and he doesn't think he will be able to get hard. I guess I understand, but what if we miss our window??