I think guys are usually cool with staying friends after a relationship while some aren't. Whereas, girls are a bit iffy when it comes to this and it really comes down to how they feel whether you guys will be friends afterwards, so if the guy is breaking it up he has to be very tactful about things.
But I think both guys and girls can be friends without it being sexual, but guys are probably more likely to find attraction as they get to know a girl, but the thing with guys attraction is that it's either on or off, so you can't say it's always on, like I know some of my female friends I'm not going to be attracted to in that way but they'll always be good friends.
Keen