Does the emission of fluid upon remembering something, seeing a picture, or foreplaying with a beautiful person necessitate ghusl and shaving the pubic hair? What is its ruling?

One must be wary of wicked thoughts that incite desire and must lower the gaze from forbidden things, in compliance with the Almighty's saying: (Tell the believing men to reduce [some] of their vision and guard their private parts. That is purer for them. Indeed, Allah is Acquainted with what they do), and with the Prophet's (peace be upon him) saying: "Do not follow a glance with another glance, for the first is yours but the last is not." It is not permissible to look at forbidden pictures and films, nor at a beardless young man with lust. If semen is discharged from me, a full ghusl (definition) (ritual bath) is required. If madhiy (pre-seminal fluid) is discharged, only the penis needs to be washed, and it nullifies ablution. Shaving the pubic hair is among the acts of fitra (natural disposition) and has no relation to ghusl for Janabah (definition) (major ritual impurity).