O. Muhammad, peace and blessings be upon him, never committed adultery, and he required his followers to engage only in lawful marriage relationships with women, and forbid s*x outside of Almighty God's Ordinance.

Satan (the devil) threatens you with poverty and orders you to commit Fahsha (evil deeds, illegal s*xual intercourse, sins etc.); whereas Allah promises you Forgiveness from Himself and Bounty, and Allah is All-Sufficient for His creatures' needs, All-Knower. [Holy Quran 2:268]

Say (O Muhammad SAW): (But) the things that my Lord has indeed forbidden are AlFawahish (great evil sins, every kind of unlawful s*xual intercourse, etc.) whether committed openly or secretly, sins (of all kinds), unrighteous oppression, joining partners (in worship) with Allah for which He has given no authority, and saying things about Allah of which you have no knowledge. [Holy Quran 7:33]

And come not near to the unlawful s*xual intercourse. Verily, it is a Fahishah [i.e. anything that transgresses its limits (a great sin)], and an evil way (that leads one to Hell unless Allah forgives him). [Holy Quran 17:32]

The adulterer marries not but an adulteress or a Mushrikah and the adulteress none marries her except an adulterer or a Muskrik [and that means that the man who agrees to marry (have a s*xual relation with) a Mushrikah (female polytheist, pagan or idolatress) or a prostitute, then surely he is either an adulterer, or a Mushrik (polytheist, pagan or idolater, etc.) And the woman who agrees to marry (have a s*xual relation with) a Mushrik (polytheist, pagan or idolater) or an adulterer, then she is either a prostitute or a Mushrikah (female polytheist, pagan, or idolatress, etc.)]. Such a thing is forbidden to the believers (of Islamic Monotheism).
[Holy Quran 24:3]

Verily, those who like that (the crime of) illegal s*xual intercourse should be propagated among those who believe, they will have a painful torment in this world and in the Hereafter. And Allah knows and you know not.
[Holy Quran 24:19]

O Prophet! When believing women come to you to give you the pledge, that they will not associate anything in worship with Allah, that they will not steal, that they will not commit illegal s*xual intercourse, that they will not kill their children, that they will not utter slander, intentionally forging falsehood (i.e. by making illegal children belonging to their husbands), and that they will not disobey you in any Ma'ruf (Islamic Monotheism and all that which Islam ordains) then accept their Bai'a (pledge), and ask Allah to forgive them, Verily, Allah is Oft-Forgiving, Most Merciful. [Holy Quran 60:12]

People committed fornication and adultery in most places around the word in Muhammad's time, yet he never once did so, and he forbade all of his followers from this evil practice.

P. Muhammad, peace and blessings be upon him, forbade usury and interest on money lending, as Jesus, peace and blessings be upon him, had done centuries before him. It can be easily shown how usury eats away at wealth and destroys the economic systems throughout history. Yet, just as in the teachings of the prophets of old, Muhammad, peace and blessings be upon him, held that such practices were most evil and must be avoided in order to be at peace with the Creator (Allah).

Those who eat usury (deal in interest) will not stand (on the Day of Resurrection) except like the standing of a person beaten by Satan leading him to insanity. That is because they say: Trading is only like usury, whereas Allah has permitted trading and forbidden usury. So whosoever receives an admonition from his Lord and stops eating usury shall not be punished for the past; his case is for Allah (to judge); but whoever returns to dealing in usury, such are the dwellers of the Fire - they will abide therein.
Allah will destroy Riba (usury) and will give increase for charity, alms, etc. And Allah likes not the disbelievers, sinners. Truly those who believe, and do deeds of righteousness, and perform Salat, and give Zakat, they will have their reward with their Lord. On them shall be no fear, nor shall they grieve.
You who believe! Be afraid of Allah and give up what remains (due to you) from usury, if you are believers.
And if you do not do it, then take a notice of war from Allah and His Messenger but if you repent, you shall have your capital sums. Deal not unjustly, and you shall not be dealt with unjustly. [Holy Quran 2:275-279]

Q. Muhammad, peace and blessings be upon him, never gambled and did not allow it. Like usury, gambling takes away wealth but at an even faster pace.

People ask you (Muhammad) about alcohol and gambling. Say, 'There is great sin in both of them and (some benefit) for humans, but the sin is greater than any benefit from them.' And they ask you what they should spend (for charity, etc.). Say, 'Whatever is above your basic needs.' So, Allah makes it clear to you His Laws in order for you to give thought.
[Holy Quran 2:219]

Gambling had not been viewed as so evil until the time of Muhammad, peace be upon. Today, it is well established the damage gambling causes to families and even mental health. The idea of getting something for nothing is not the proper way of life prescribed by the teachings of Muhammad, peace and blessings be upon him