If a husband and wife both agree that they want to try something (e.g., oral sex, different positions, sex toys, etc.), then the Bible does not give any reason why they cannot.
Kama mume na mke wote wamekubaliana kwamba wanataka kujaribu jambo fulani (kwa mfano, mapenzi ya mdomo, kwa njia mbalimbali, mifano ya ngono ya vidude na kadhalika), basi Bibilia haitoi sababu yoyote ya kutofanya hivyo.