i use this to gauge my test levels, cheaper than one of those Internet test things.

Level 1: Erections improve in strength and duration. Libido up slightly.
Level 2: You start looking at all the hot ladies and getting involuntary erections.
Level 3: Sex begins to become the only thing you're thinking about when you're not training.
Level 4: Sex is the only thing you think about.
Level 5: You increase the normal acceptable age range of women you're attracted to by a few years.
Level 6: you increase your acceptable range of age groups to include any living female over 18.
Level 7: when your gay mate offers you his mum if he can suck you off you consider it.
Level 8: your gay friend is now brushing his teeth while you bone his mum.
Level 9: his nan is also getting some action.
Level 10: your gay friend is bent over getting some while you're eyeing up his dog.

Being hetero that works for me, I guess if you bat for the other team then females and males could be swapped around.

I know when I'm at level 6 I've hit it just right, I mean in the early days you get stuff wrong sometimes and Brian still isn't speaking to me even now but his nan occasionally calls.