Christian, many tropicals go dormant..I'd think it depends where one lives as to the timing of dormancy. In other words, since you're in KY, your plants might take longer to go dormant than mine. I live in IL. We have short summers.
I notice some plants go dormant while others don't. But to be honest, most of mine do..consider yourself blessed that yours don't..(S)
Heck, my Sans seem to be dormant yr round,no matter what I do..lol..
Some plants slow down, but don't go completely dormant. Considering lack of sun, and withholding fertilizers, this has a lot to do with it.
If your plants are doing well with the amount of water you're supplying in winter, I'd continue doing what you have. Toni

The dormancy is related to the shorter days and weaker sunlight in the winter, as well as possible cooler temperates in the house during the winter. If you have good sun and warm rooms, your plants will continue to grow over the winter. Some varieties of plants seem way more sensitive to these seasonal changes than others.

If they are actively growing, water them like usual. If they are not actively growing, cut back on the water. It is more important to observe the needs of the individual plant than to stick to a seasonal schedule.

Also, depending on where plants originate from, the dormancy period can be during summer months instead of winter. For example, Cyclamens that are native to the Southern Mediterranean regions go dormant in the summer when there is no rain and too much sun. It's always a good idea to learn a little about the plants you grow, which will help you to care for them.

A lot of indoor plants may not really go dormant but many of them will slow down in growth. Others will continue to grow all year round, perhaps slightly less in winter. But, like watergal said, if you provide ideal conditions through every season, the plants will keep growing. And I agree with Toni. Where you live also makes a big difference.