80s movie help..........scific or horror?

[hybridracers]

Hey guys, been trying to solve this movie title mystery for a long time. I remember watching it in the 80s as a kid. Never saw it again and I only remember the ending.


Teenage guy, starts to mutate and become a creature (I get the memory it was a time thing like a 17 year locust) as he is changing he rapes his girlfriend, probably to impregnate her to complete the cycle and then wanders off in the woods.

I cannot remember this movie to save my life.

[hybridracers]

consider this solved...........digging through other posts solved this. THANKS!!!!

[RCMerchant]

You must have found out it was the BEAST WITHIN,eh? 

[Trevor]

You must have found out it was the BEAST WITHIN,eh? 

I was going to suggest that one for this again.