STDs FROM SENSUAL MASSAGE?
Redness and sensitivity after masturbation or a "hand job" can be normal. Irritation may be from friction or from the use of different lotions and can be uncomfortable. Someone might wish to bring in his or her own personal lubricants without chemicals—either water or silicone based. Check out a prior question for more information about lube: http://www.sfcityclinic.org/drk/menshealth34.asp. You can also ask the masseuse to reapply lubricant more frequently—too much friction may make the skin raw and red.
To your health,
STD TRANSMISSION AND PREVENTION ADVICE
Latex, polyurethane, male, female -- we've got the lowdown on them all.