Interesting points there that you raised love_fan.
Yes Greg is always trying to impress Nick with his sexual experience, which if spoilers are correct it continues into Season 8. Which then makes me wonder, maybe the boys really arent together, and they have spend the last eight years now in total denial.
Ok some of you might be saying no there together and item, but if thats the case why is Greg still trying to impress Nick.
So, my theory is that they've been skirting around the issue for such a long time now its common nature, even maybe between other CSI's as well.
Maybe others have noticed how Nick behaves around Greg OR (to the point) with Greg.
What a lesbian as a character or as an actress, well actress is allready there.
Yeah Funnysmackin' was Nick loosing control which was really good to see Warrick trying to resrain him (and possibly protecting his close friend from any trouble), also Gum Drops we see Nick the most emotionally charged.