Okay I'll have to let my mom know that neutering would really only be a risk. I'm 18 now (well in 2 weeks) and I've owned rats since I was little. I've always had lone (male) rats though, and no once had an agressive rat, and I kept them in tanks. It was a huge 55 gallon tank, but it was still a tank which I've learned is unhealthy even though they lived until old age. Hence why I'm on this site actually. I want to educate myself before getting another rat, to make it's life even better than my previous rats. (I did that with my rabbits too). I have an experienced vet around me; he spayed my guinea pig after she got cysts on her uterus, and I trusted him with my eldest of my two rabbits. I'm calling tomorrow just to be sure he is experienced with rats. I know there's no way for a male to get pregnant. My mother actually informed me today of getting him fixed for scent reasons after I get him. I think she wanted to stop the urine marking as well? But anyway, I'll show her this thread tomorrow and let her know that he will need a friend. Thank you guys! Any more advice would be fantastic C: