This one is a bit tricky but I'm satisfied of the result.

Prompts : cock,testicules,b4ll_sn1ff,sniffing balls,nose between balls,(nose pressed against balls:1.1),face down,looking up,(hidden mouth:1.1)

When in pov, use the prompts "penis on side" or "penis on face" or might not have any penis at all.

Full process by killedmyself