Why can't people wrap their heads around platonic relationships?!

I just got grilled by a friend about the fact that he took a woman out for a date over a year ago, and on that date I knew her from back in the day so I asked if we could exchange numbers. He said he had to have his guard up around me with women now.

I admit that it was a dick move to draw her attention away from him when I should've been his hype man, but I did not like the insinuation that I did it because I wanted to try it on with her. I just thought she was cool.

The majority of my closest friendships are with women. Women I've shared a bed with without "anything" happening.

I get this shit all the time from people saying that I am only doing things/are nice to women because I want to have sex with them.

I hear it from both men and women that I've helped out in the past that the reason I'm helping a female friend out this time is because I obviously want to have sex with them.

Why can't people accept that I see women as people and co-equals with whom I can have interactions that aren't all about sex?!