I have definitely had this sensation many times from sexual activities, or leading up to them, as foreplay. Also while masturbating from about age 2 and up, instinctively using effleurage upon my own skin, as I comforted myself to help me sleep. I don’t see why anyone would be troubled if this phenomenon is associated with sexuality. It is undoubtedly sensual, and so is sex, so it is natural for there to be some overlap.
While many colloquial and formal terms used and proposed between 2007 and 2010 included reference to orgasm, there was during that time a significant majority objection to its use among those active in online discussions, many of whom have continued to persist in differentiating the euphoric and relaxing nature of ASMR from sexual arousal. However, by 2015, a division had occurred within the ASMR community over the subject of sexual arousal, with some creating videos categorized as ASMRotica (ASMR erotica), which are deliberately designed to be sexually stimulating.