To those asking for a source, I believe I gave one. Kiruv l’arayyos.
But there is no issur of arayos vis-a-vis one’s own wife while she’s a tehorah.
The whole point of arayos is that you shouldn’t be intimate with someone forbidden to you. But since you’re permitted to be intimate with your own wife when she is a tehorah, doesn’t it make sense that the argument of “kiruv l’arayos” doesn’t apply?
The Wolf