How to reply to Thank You without sounding weird, arrogant, or sexual?

YES, I get pleasure from helping others. Pleasure doesn't always mean sexual in nature. It just means you are happy and satisfied. And you can be happy and satisfied just by sleeping.

Just say "My pleasure" nothing abnormal about it unless you make it to be.
Other suggestions:

• You're welcome
• happy to help
• no worries, please give 5 star rating on app.

I just reply with this emoji '👍🏻'

Also, when will be start normalising sounding sexual? TWSS is already dying a painful death. We need to revive it.

"no problemo" is my go to response
And if it's a close friend - "bhakk"

I agree that Welcome is way too old fashioned and even literally weird to use. But my pleasure is fine to be used in personal life. In official setup, “np”/ “no problem” does the work.