So you want to raise your intelligence, develop your smarts? So go stick your head in a paper bag. No joke. This is called ""masking"" and it's only one of Wenger's startling exercises designed to ""train"" the carotid valves at the back of your neck to open wider. You still don't get it? Well, the extra carbon dioxide will stimulate blood circulation to the brain and all those malnourished brain cells will come to life. Wenger's proposed three-week regimen of ""brain-boosting"" also includes Vitamin E--good for circulation--crawling around stomach-to-floor like a baby, underwater swimming and other exercises that, performed publicly, are as likely to get you locked up as they are to raise your I.Q. Wenger's theories are based--vaguely--on the programs for autistic children worked out by Doman and Delcato at the Philadelphia Institute for the Advancement of Human Potential. They will, he says, work for everyone by developing the medulla, pons and middle brain and thus preparing the cortex for a kind of intellectual take-off. Currently ""we are all significantly brain damaged"" in part due to those infant atrocities, playpens--observe the poor, dull children with ""playpen eyes."" They never get over it. Wenger, we learned, is the president of the MENSA Colleges for people with high I.Q.s, and once again we were reminded of the thin line between the genius and the crackpot.