Remember the ultimate Muslim belief: there is One True God Who creates love and unites people.
For a detailed description of what points 1-3 are talking about read: What Muslim Women Look For In A Husband.
Yet, things like physical connections outside of marriage, 'experimenting' or having a 'fling' don't exist in Islamic ethics.
Things like self-preservation, discipline and protection, do.
Please remember this whenever you're faced with a Muslim conundrum. Some Muslims outright say it 'I'm dating' and they are, in the complete boy-meets-girl-third-base sense. This entire dating culture of meeting someone for only sex, for only a short-term relationship, is not the ideal or healthiest way to go about finding a partner-in-crime.
Loving God and following His ultimate guidance is the sole reason and goal in Muslim belief. The more real answer is that yes, a lot of Muslims do. This type of dating to see if it's going anywhere or just stringing people along with heartache is not in Islamic law. Before you try to understand the hows and whys of Halal Dating, bring God into the equation.