I have once had a tick, it was in my groin away from the important bits. I borrowed an ordinary hair removal tweezers and plucked everything out, including the mouth parts which were left visible as tiny black spots. This meant plucking bits of skin off too, not a lot but into the living part. To my surprise I felt nothing apart from the tugging doing this and ascribe it to the beast injecting some form of anaesthetic into me as it attached itself. I never felt the insect itself until I was showering and felt a bump - had a look and there it was. I am confident it had been there less than 24 hours and I never got any reddening around the site. Recently someone I know had one on her bottom like jourdain - these things appear to go for the oddest locations. I read somewhere that if they are infected with Lyme disease then it takes them at least 48 hours to transmit it into a human host.