[QUOTE=Wylie's Mom;4491061]Neutering may not help w/ marking, but it might help w/ him humping your 5 year old....so if it were me, I'd neuter. Many dogs (male and female) hump.
My 2 boys have a "lover dog" that they have dates with 
, and my female humps her donut bed (omg, so funny). QUOTE
This is soooo funny, ya just gotta love these silly lil yorkies.