Short answer
Muslim spouses should keep intimacy within the boundaries established by Islam, while also observing privacy, mutual consideration and avoiding harm.
Islamic Guidance
What Islam teaches
Islam permits lawful intimacy between spouses and prohibits specific forms of sexual conduct. Menstruation and certain other circumstances also have specific rulings.
Practical Guidance
What you can consider
Learn the basic fiqh of marital intimacy, maintain privacy, communicate respectfully and avoid practices that Islamic law prohibits.
Sources
Qur'an 2:222-223; Qur'an 23:5-7.