See, this IS the problem: See post #6.
When, after arresting the guy, the police could only say that he ‘possibly got one pregnant’ it should be a clue as to the general moral state of the girls this guy was hanging around with.
As for the STD’s - this guy was twenty-one, these girls were in their mid to late-teen’s (since, I guess there were a number of them) - you lay down with dogs...