I look at the former as part of the basis for the latter. It's not limited to Christian upbringing, really. Honestly I think a lot of messages sent in our culture undermines a man's willingness to be a sexual creature. Some of it comes from very religious foundations of all flavors, and a lot of it comes from the very bad messages women (and our culture) sends to men regarding 'what women want.'
I love my mom a lot, but if I listened to her advice on courtship, I'd never have a second date. Women, for some reason, perpetuate the bad messages being sent to men on how to behave in a sexually appealing way.
For me, the cardinal offender is the idea that women somehow want a nonmasculine male. That makes no sense and hasn't much evidence to support it, yet every time a man camoflauges his sexual nature around a woman, it rears its ugly head. The result is too many frustrated males and too many unhappy women.
I think it's because mothers, understandably, want to be able to control their little boys. When those lessons and strictures carry over into adulthood, however, the problems that result for society as a whole are huge. With so many fathers either absent or spineless these days, there is often no male presence there to say, "Leave the boy alone, Marge - if he's going to grow up he has to learn those lessons for himself."
Perhaps the widespread military service undertaken by 17-18-year-olds in past geneations made a difference, and helped a larger percentage of young men establish themselves as independent individuals, free of Mom's apron strings and her teachings on romance. In these days of the "slacker culture" where it isn't uncommon for 30-year-old men to live with their parents, something is broken.
The problem there is that we could argue all night about what makes a man a masculine man, and what non-masculine men lack. The truth is that it varies wildly from person to person, crowd to crowd. The manly attributes that get you by in NYC aren't he same ones that will sell in Ruston Lousiana, and vice versa.